1977 Mercury Comet Drivetrains

Below you will find various in-demand Mercury Drivetrains, components and accessories for your 1977 Comet. Advance Auto Parts has popular Comet parts like Drive Shafts and Axles, Spindles, Transfer Cases and more. You’ll also find aftermarket and OEM Drivetrains for other Comet model years including 1967, 1968, 1969, 1971, 1972, 1973, 1974, 1975, 1976 and more. Select a category of 1977 Mercury Comet Drivetrains below and start saving instantly.

Popular 1977 Mercury Comet Drivetrains Categories

Differential Oil

Drive Shaft Support Bolts

U-Joints

Rear Differential Cover Gaskets

Differential Open Unit and Components

Differential Bearings

Bearing Pullers

Axle Shaft Seals

Differential Pinion Pilot Bearings

U-Joint Centering Yokes

Axle Shaft Bearings

Differential Carriers

Differential Bearing Kits

Input Shaft Bearings

Differential Spider Gear Kits

Differential Rebuild Kits

Differential Carrier Shim Kits

Differential Pinion Seals

Differential Clutch Packs

Differential Ring and Pinions

U-Joint U-Bolt Kits

Differential Cases

Differential End Yokes

Differential Pinion Supports

Spindle Lock Nuts

Differential Spools

Differential Lock Springs

Differential Carrier Bearing Adjusters

Transfer Case Output Shaft Bearings

Differential Pinion Bearing Kits

Complete Differentials

Differential Ring Gear Bolts

Bearing Race Drivers

Spindle Lock Nut Thrust Washers

Spindle Retainers

Differential Crush Sleeves

Differential Side Bearing Spacers

Differential Pinion Shims

Differential Pinion Shaft Nuts

Differential Gear Install Kits

Differential Cross Pins

Automatic Transmission Differential Carrier Gaskets

Differential Housing O-Rings

Differential Side Gear Thrust Washers

Differential Pilot Bearing

Differential Pinion Gear Thrust Washers

Axle Shaft Studs

Differential Drive Pinion Gear Bearing Retainer Bolts

Differential Drive Pinion Oil Deflectors

Spindle Washers

Axle Shaft Bearing Retainers

Limited Slip Differential Assemblies

Differential Lock Washers

Differential Clutch Pack Clips

Differential Lock Thrust Blocks

Differential Pinion Bearing Spacers

Differential Bearing Adjuster Nut Lock Bolts

Axle Housing Fill Plugs

Differential Carrier Bearing Races

Drive Shaft Pinion Yoke Washers

Essential Drivetrains for 1977 Mercury Comets

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$729.99

9″ Yukon 3.062″ aluminum case, HD dropout housing with forged caps. The Yukon aluminum dropouts feature a adjuster lock which is offset 90 degrees, offering an uninterrupted bearing cap for higher strenth. Made from A356-T6 aluminum and featuring a through-bolt desgin, this dropout is built for high horsepower & tall tires.Rated up to 1000HP!

Product Features:

Fits Ford 9″
3.062″ carrier race diameter
A356-T6 aluminum
Thru-bolt design added strength

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$28.49

With advanced load-carrying capacity and compact design, tapered roller bearings are used in wheel bearings, transmissions, differentials, transfer cases and other miscellanous applications. FAG manufacturers over 100 million tapered roller bearings annually.

Product Features:

High-precision and High-quality components used in all KITs
Coverage of classic and new high-tech solutions for the best system coverage

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$6.99

This universal joint U-bolt kit is designed to match the original components required to repair and resecure universal joints on specified vehicles. Made of quality components, this kit is engineered for reliable performance and durability.

Product Features:

Direct replacement – this universal joint U-bolt kit is designed to match the original components required to repair and resecure universal joints on specified vehicles
Ideal solution – this kit is a reliable replacement for original components that are missing or have failed due to fatigue
Durable construction – this kit is made from quality components to ensure reliable performance and a long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

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$175.99

Yukon Pinion installation kits are a terrific solution for gear installation on lower mileage vehicles where the carrier bearings & races can be reused. This kit uses Timken bearings and races along with a high quality pinion seal and small parts. Included in this kit are the pinion bearings and races, pilot bearing (if applicable), crush sleeve (if applicable), complete pinion shim kit, pinion nut, thread locker, and marking compound with brush. Yukon does extensive research for each application to make sure your kit will arrive with all the correct parts you need to install your pinion gear.

Product Features:

Fits Ford 9″ without aftermarket Daytona pinion support
Included are pinion bearings and races, pinion seal, pilot bearing , crush sleeve , complete pinion shim kit, and marking compound with brush.

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$13.99

Our wheel seals are engineered using only the highest-quality materials to meet vehicle manufacturer specificatons. We work with suppliers to design seals that meet FAG’s quality standards. Seals are designed to protect wheel end components from contamination – such as dirt, dust, and moisture – and prevent the loss of grease over the life of the bearing. The specifications for wheel seals are very demanding, and the type required depends on the specific application, position and vehicle class.

Product Features:

High-precision and High-quality components used in all KITs
Coverage of classic and new high-tech solutions for the best system coverage

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$317.99

Yukon standard open spider gear kit for 9″ Ford with 31 spline axles and 4-pinion design. Yukon uses higher quality materials and better techniques than OEM to ensure a longer lasting spider gear set. All components come with a one year warranty against manufacturing defects.

Product Features:

Spider gear kit
Fit Ford 9″ open differential with 31 spline axles
Includes two side gears, four pinion gears, cross pin shaft, roll pins and spider gear thrust washers.

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$16.99

9″ 31spline (69-73Mustang & OTHERS) axle seal (1.5″ shaft).Yukon Mighty seal.

Product Features:

Rear axle seal
Fits 1969-1973 Ford Mustang with Ford 9″

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$45.99

All Motive Gear products are engineered for their specific application and manufactured in state of the art facilities. All of our products undergo rigid quality control processes to insure proper fit, performance and longevity. Motive Gear products can be found in the winners circle at NHRA, IHRA, NMRA, NMCA, SODA, SCORE, BITD, Ultra-4 and NASCAR events because we offer unmatched selection and quality demanded by racers and their crew chiefs – the same quality and selection demanded by DIY customers and top mechanics. With four warehouses strategically located across North America, most Motive Gear orders arrive within 2-4 days. Win with Motive Gear!

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$21.99

8.75″ Chrysler & 9″ Ford preload shim kit.

Product Features:

Preload shim kit for Ford 9″ and Chrysler 8.75″ with ’41’ and ’42’ case housing

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$148.99

Redline Synthetic “Shock Proof” Oil with positraction Additive. 4 Quarts.

Product Features:

Includes four quarts of Redline Shockproof oil and one 4oz bottle of Yukon positraction additive

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$4.99

Pinion gear thrust washer for 8″ and 9″ Ford, Model 20, and 7.25″ Chrysler.

Product Features:

Pinion gear thrust washer for Ford 8″, Ford 9″ and Chrysler 7.25″

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$3.99

Adjuster lock bolt 3.062″ & 3.250″ Yukon Ford 9″ Drop Out.

Product Features:

Side adjuster lock bolt

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$71.99

Adaptor washer for 28 spline pinion in oversize support, for 9″ Ford.

Product Features:

Adapter washer
Fits Ford 9″
Adapts 28 spline pinion into 35 spline pinion support

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$94.99

3.062″ side adjuster, Only Fits Yukon Ford 9″ Drop Out, new design ONLY.

Product Features:

Side adjuster
Fits Ford 9″
3.062″ designs only

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$40.99

9.25 Chrysler FRONT PINION KIT , 03 & UP DODGE TRUCK .

Product Features:

Pilot bearing
Fits Ford 8″

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$249.99

Product Features:

Spider gear kit
Fits Ford 9″ 31 spline open differential
Includes two side gears, four pinion gears, cross pin shaft, roll pins and spider gear thrust washers.

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$219.99

Product Features:

Fits Ford 9″ with 28 spline pinion
Larger inner pinion bearing reduces gear deflection under high load
6061 aluminum
Annodized purple
Does not include races

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$9.99

Crush Sleeve for Model 20, Ford 10.25″, 10.5″, 7.5″, 8.8″, 9 3/8″, 9″ & 9.75″. .480″ long.

Product Features:

Crush sleeve for AMC Model 20, Ford 10.25″, 10.5″, 7.5″, 8.8″, 9″ and 9.75″
0.480″ tall

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$222.99

Product Features:

FRD 10BL 9.0 R/P 3.70 MG

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$5.99

Model 20 & Model 35 axle stud 0.620″ Dia. Shank.

Product Features:

Axle stud for AMC Model 20 and Model 35
1/2″ x 20 thread
0.620″ knurl diameter
1.625″ long

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$5.99

Product Features:

Copper washer
Fits Ford 8″ and 9″

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$889.99

The Yukon Dura Grip provides aggressive yet smooth traction to give you the confidence & performance you need. Get longer life and better traction with the heavy duty Yukon Dura Grip Positraction. The Yukon-Trac Loc uses a nodular case, billet side hat, and forged internals for higher strength than stock Trac-Locs. The units use composite clutches for high performance and long life. All units are Rebuildable. Yukon offers a one year warranty against manufacturing defects.

Product Features:

Fits Ford 8″ with 28 spline axles
Trac Loc positraction
Clutch style positraction
Aggressive design
Internal gears are manufactured using forged 4320 steel and cut to provide stronger teeth
Fully rebuildable
Assembled in the USA

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$7.69

High-precision and High-quality components used in all KITs
Coverage of classic and new high-tech solutions for the best system coverage

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$33.99

Product Features:

MINI INSTALL KIT FORD 9″

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$289.99

Good used Yukon yoke for Ford 8″ with a 1310 U/joint size. 3.219″ snap ring span, 1.062″ cap diameter. Outside snap ring. All Yukon yokes come with a one year warranty against manufacturing defects.

Product Features:

Fits Ford 8″
25 spline
1310 u-joint size
Outside snap ring design
3.219″ snap ring span
1.062″ cap diameter
U-bolt style

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$26.99

9″ Ford pinion nut, 35 spline Large pinion oversize.

Product Features:

Pinion nut
Fits Ford 9″ with 35 spline pinion

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$47.49

Motive Gear offers some of the toughest drive train components on the market today. If you are looking for the largest line of performance ring and pinion gear options available with gear sets in a wide range of ratios for nearly every application, both on and off-road, check out Motive Gear. Motive Gear products can be found in the winner’s circle at racing events worldwide. The superior quality of Motive Gear components is the result of years of racing development, outstanding design and state-of-the-art manufacturing methods. Extensive testing is performed on all products by our in-house engineers.

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$4.99

Ford 8″ & 9″ TracLoc ring gear bolt, 1-1/4″ long.

Product Features:

Ring gear bolt for Ford 8″ and 9″
For use with Trac Loc limited slip
1.25″ long

Upgrade your 1977 Mercury Comet with Top-Quality Drivetrains

When it comes to maintaining or upgrading your 1977 Mercury Comet, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your Mercury or enhancing its overall performance, Drivetrains are key to keeping your Comet functioning at its best. At Advance Auto Parts, we offer a wide selection of 390 Drivetrains for the 1977 Mercury Comet, designed to meet your needs without breaking the bank. From Drive Shafts and Axle replacements to Spindles upgrades, we’ve got you covered with parts that fit your vehicle perfectly and ensure long-lasting performance.

Affordable Prices and Wide Selection

Shopping for Drivetrains for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Drivetrains for your 1977 Mercury Comet at great prices. Our Drivetrains inventory for this model ranges from just $1.99 to $1,211.99, with an average price of $259.46. Our 390 Drivetrains in stock come from 14 trusted brands, so you’re sure to find the right part for your 1977 Mercury Comet without overspending.

Top Brands and High Customer Satisfaction

Advance Auto Parts takes pride in offering only the best brands in the automotive industry. For your 1977 Mercury Comet, we stock popular OEM and aftermarket Drivetrains from top names like Moog, National, Dorman, and more. Moog Drivetrains start at just $11.99 and boast an impressive 4.5 stars average rating from customers. National and Dorman also bring quality to the table, with Drivetrains available starting at $6.99, and at an average 4.3 stars rating. With 689 customer reviews and counting, our 1977 Mercury Comet Drivetrains have a strong track record of reliability, ensuring you can trust your purchase.

Explore Related Parts and More

While you’re here, don’t forget to check out other essential categories that go hand in hand with Drivetrain upgrades. Explore related part types like Batteries and Chargers, Oil and Lubricants and more to make sure your 1977 Mercury Comet is always ready to roll. We’re committed to providing you with everything you need to keep your Comet in top shape, all in one place. Start shopping confidently below for your 1977 Mercury Comet!

Best-Selling Drive Shafts and Axles for 1977 Mercury Comets

Enhance the driving experience in your Mercury with 10 quality Drive Shafts and Axle components, starting at $5.99.

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$22.49

This drive shaft bolt is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:

Direct replacement – this engine mount bolt matches the fit and function of the factory part on specified years, makes and models
Ideal solution – this drive shaft bolt is a reliable replacement for an original part that is missing or has failed due to fatigue
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

from

$26.99

Axle seal.Yukon Mighty seal.

Product Features:

Rear axle seal
Fits Ford 8″
2.264″ O.D.
1.365″ I.D.

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$10.99

Yukon Ring & Pinion sets give you the confidence of knowing you’re running gears designed for the harshest of conditions. Whether it’s on the street, off-road, or at the track; Yukon ring & pinion sets deliver unrivaled performance & quality. Yukon uses t

Product Features:

Fill plug
Fits Ford 9″

from

$67.99

Product Features:

Axle bearing retainer for Ford 9″
Fits large bearing applications
1/2″ bolt holes
3 1/2″ x 2 3/8″ bolt pattern

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$689.99

The Yukon carrier bearing Puller works with an impact gun to quickly and safely remove carrier bearings without damaging them. This unit comes with a handy bench top stand and works with up to most standard one ton applications. This unit is works with differentials up to one-ton applcations. It is not compatible with Dana 70HD, Dana 80, 10.25″ & 10.5″ Ford, or GM & Chrysler 11.5″ differentials.

Product Features:

Carrier bearing puller
Works with an impact gun to safely and easliy remove carrrier bearings
Not compatible with Dana 70HD, Dana 80, Ford 10.25″ and 10.5″ or Gm and Chrysler 11.5″ applications

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$92.99

Conversion bearing for small bearing Ford 9″ axle in large bearing housing.

Product Features:

Axle bearing
Fits Ford 9″
Conversion bearing to install small bearing axle into large bearing housing
3.150″ O.D.
1.377″ I.D.

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$71.99

Adaptor washer for 28 spline pinion in oversize support, for 9″ Ford.

Product Features:

Adapter washer
Fits Ford 9″
Adapts 28 spline pinion into 35 spline pinion support

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$22.99

Product Features:

Axle bearing retainer for Ford 9″
Fits large and small bearing applications
3/8″ bolt holes
3 9/16″ x 2″ bolt pattern

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$22.99

Product Features:

Axle bearing retainer for Ford 9″
Fits small bearing applications
3/8″ bolt holes
3 5/16″ x 2″ bolt pattern

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$5.99

Model 20 & Model 35 axle stud 0.620″ Dia. Shank.

Product Features:

Axle stud for AMC Model 20 and Model 35
1/2″ x 20 thread
0.620″ knurl diameter
1.625″ long

Most Popular 1977 Mercury Comet Spindles

Customize your Mercury with 4 Spindles products like Spindle Lock Nuts, Spindle Retainers, and Spindle Lock Nut Thrust Washers, all priced under $6.99.

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$4.49

This spindle nut is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:

Direct replacement – this spindle nut matches the fit and function of the factory part on specified years, makes and models
Ideal solution – this nut is a reliable replacement for an original part that is missing or has failed due to fatigue
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

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$6.99

This spindle nut retainer is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:

Direct replacement – this spindle nut retainer matches the fit and function of the factory part on specified years, makes and models
Ideal solution – this retainer is a reliable replacement for an original part that is missing or has failed due to fatigue
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

from

$4.99

This spindle nut washer is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:

Direct replacement – this spindle nut washer matches the fit and function of the factory part on specified years, makes and models
Ideal solution – this washer is a reliable replacement for an original part that is missing or has failed due to wear
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

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$2.99

Direct replacement – this spindle nut washer matches the fit and function of the factory part on specified years, makes and models
Ideal solution – this washer is a reliable replacement for an original part that is missing or has failed due to wear
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

Top Picks for 1977 Mercury Comet Transfer Cases

Upgrade Mercury Comets with top-quality Transfer Cases parts, including 4 OEM and aftermarket selections for your 1977 model.

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from

$36.49

National has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.

Product Features:

Designed to repair damaged, grooved or worn shafts
Durable stainless steel construction for corrosion-free sealing surface that surpasses most original shaft specifications
Ideal for a shaft where indications of seal wear, such as tracks or grooves have developed
Ultra-thin construction (0.01/0.25mm wall thickness) allows original seal size to be used with minimal additional lip loading
Easy to install with removable flange and installation tool

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$49.49

Product Features:

BUILT TO LAST: Advanced heat treatment process for strength
PREMIUM MATERIALS: Precision manufactured using premium-grade steel for lasting performance and extended bearing life
RELIABLE PERFORMANCE: Element size and quantity are engineered to meet or exceed the load rating of OE bearings
COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on

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$62.99

The FAG repair sleeve is a precision element that provides additional sealing for damaged shafts. Made of heat-treated stainless steel, the FAG repair sleeve signifcantly increases the life of the shaft and prevents premature wear. Since no shaft removal or machining is required during the repair, the repair sleeve is a cost effective repair solution to protect damaged surfaces.

Product Features:

High-precision and High-quality components used in all KITs
Coverage of classic and new high-tech solutions for the best system coverage

from

$13.99

High-precision and High-quality components used in all KITs
Coverage of classic and new high-tech solutions for the best system coverage

In-Demand Universal Joints for 1977 Mercury Comets

Select from 18 premium Universal Joints parts for your 1977 Mercury Comet, with prices ranging from $6.99 to $111.99.

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$11.99

By constantly introducing design enhancements that extend product life and simplify installation and replacement, MOOG has earned its reputation as the chassis industry’s Problem Solver.

Product Features:

For U-Joints 375, 430, 434 & 498
Fits 1-1/8″ bearings

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$35.99

Product Features:

BUILT TO LAST – Rugged design specifically engineered for fleets, off-highway and commercial vehicles
STRONG AND DURABLE – Bearing cups are cold-formed, case-hardened and precision ground for strength and durability
KEEPS DIRT OUT – Abrasion-resistant nitrile seals provide ideal grease retention and protection from under-vehicle contaminants
GREASEABLE DESIGN – Drilled and tapped grease fitting holes for easy servicing and cross trunnions with large grease reservoirs with radial grease channels for grease distribution
INHIBITS PREMATURE WEAR – Cross trunnions ground to a 15-25 RMS finish for a smooth surface free of microscopic grooves that can cause premature wear
RELIABLE PERFORMANCE – Internal anti-drainback valve integrated into thrust washer controls lubrication flow and prevents dry startup
RIGOROUS TESTING – Comprehensive testing throughout design and development processes by MOOG engineers for quality you can count on

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$33.99

Product Features:

BUILT TO LAST – Rugged design specifically engineered for applications with higher torque and horsepower
COMPREHENSIVE COVERAGE – Available for foreign and domestic nameplates
CORROSION PROTECTION – Exclusive MICRO SHIELD coating protects against rust and corrosion
KEEPS DIRT OUT – Abrasion-resistant nitrile seals provide ideal grease retention and protection from under-vehicle contaminants
RIGOROUS TESTING – Comprehensive testing throughout design and development processes by MOOG engineers for quality you can count on
STRONG AND DURABLE – Bearing cups are cold-forged, case-hardened and precision ground while steel cross is forged and carburized heat treated for strength and durability

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$46.99

Product Features:

BUILT TO LAST – Rugged design specifically engineered for applications with higher torque and horsepower
COMPREHENSIVE COVERAGE – Available for foreign and domestic nameplates
CORROSION PROTECTION – Exclusive MICRO SHIELD coating protects against rust and corrosion
GREASABLE DESIGN – Bearing cups feature a radial design to allow 360 Degrees lubricant distribution to all bearing surfaces
KEEPS DIRT OUT – Abrasion-resistant nitrile seals provide ideal grease retention and protection from under-vehicle contaminants
RIGOROUS TESTING – Comprehensive testing throughout design and development processes by MOOG engineers for quality you can count on
STRONG AND DURABLE – Bearing cups are cold-forged, case-hardened and precision ground while steel cross is forged and carburized heat treated for strength and durability

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$15.99

Driveworks Universal Joints are designed to meet or exceed OE fit, form, and function. These universal joints are set to provide superior quality and easy installation. Driveworks Universal Joints are constructed from quality materials for extended durability. Driveworks Universal Joints are pre-lubricated with premium grease to provide a longer service life. The grease fittings are pre-installed to allow for easy maintenance (where applicable).

Product Features:

The cross is hot forged for the higher torque and horsepower
The bearing cups are made by cold forging, having higher strength and better rigidity
Bearing cups allow 360 lubricant distribution to bearing surfaces, and are precision-ground for maximum load-carrying capabilities
Lubrication grooves are designed to ensure grease penetration to entire journal and needle bearings
Grease fitting in the cross allows for easy maintenance and the flexible use of the whole assembly
Snap rings are held to strict tolerances to ensure proper cup position and retention
Nitrile rubber seals to optimize grease retention and reduce contamination

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$6.99

Direct replacement – this universal joint U-bolt kit is designed to match the original components required to repair and resecure universal joints on specified vehicles
Ideal solution – this kit is a reliable replacement for original components that are missing or have failed due to fatigue
Durable construction – this kit is made from quality components to ensure reliable performance and a long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

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$26.99

Product Features:

COMPREHENSIVE COVERAGE – Available for foreign and domestic nameplates
GREASABLE DESIGN – Greasable u-joints allow for new grease to flush out contaminants and moisture
KEEPS DIRT OUT – Nitrile rubber grease seals use a compressed double lip design for effective protection against contaminants
RIGOROUS TESTING – Comprehensive testing throughout design and development processes by MOOG engineers for quality you can count on
STRONG AND DURABLE – Bearing cups are cold-forged, case-hardened and precision ground while steel cross is forged and carburized heat treated for strength and durability
Cross forging shape and flash provide easier installation and high strength

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$44.99

Yukon 1310 U/Joint with zerk fitting on cross. 3.219″ snap ring span, 1.062″ cap diameter. Outside snap ring.

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$59.99

Yukon 1310 to 1330 adapter U/Joint. The 1310 side has a 3.219″ span and 1.062″ caps. The 1330 side has a 3.625″ span and 1.062″ caps. Both sides are outside snap ring.

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$30.99

Product Features:

BUILT TO LAST – Rugged design specifically engineered for applications with higher torque and horsepower
COMPREHENSIVE COVERAGE – Available for foreign and domestic nameplates
CORROSION PROTECTION – Exclusive MICRO SHIELD coating protects against rust and corrosion
KEEPS DIRT OUT – Abrasion-resistant nitrile seals provide ideal grease retention and protection from under-vehicle contaminants
RIGOROUS TESTING – Comprehensive testing throughout design and development processes by MOOG engineers for quality you can count on
STRONG AND DURABLE – Bearing cups are cold-forged, case-hardened and precision ground while steel cross is forged and carburized heat treated for strength and durability

from

$27.99

Product Features:

BUILT TO LAST – Rugged design specifically engineered for applications with higher torque and horsepower
COMPREHENSIVE COVERAGE – Available for foreign and domestic nameplates
CORROSION PROTECTION – Exclusive MICRO SHIELD coating protects against rust and corrosion
GREASABLE DESIGN – Bearing cups feature a radial design to allow 360 Degrees lubricant distribution to all bearing surfaces
KEEPS DIRT OUT – Abrasion-resistant nitrile seals provide ideal grease retention and protection from under-vehicle contaminants
RIGOROUS TESTING – Comprehensive testing throughout design and development processes by MOOG engineers for quality you can count on
STRONG AND DURABLE – Bearing cups are cold-forged, case-hardened and precision ground while steel cross is forged and carburized heat treated for strength and durability

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$109.99

Yukon 1310 to Mechanics 3R adapter U/Joint.

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$63.99

Yukon 1350 Lifetime Series U/Joint. 3.625″ snap ring span, 1.188″ cap diameter. Outside snap ring.

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$51.99

Yukon 1350 U/Joint with zerk fitting. 3.625″ snap ring span, 1.118″ cap diameter. Outside snap ring.

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$57.99

1310 Yukon Lifetime U/joint. 1.718″ snap ring span, 1.062″ cap diameter. Inside snap ring.

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$111.99

Yukon 1350 to Mechanics 3R adaptor U/joint.

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$74.99

1.250″ pinion adaptor sleeve (stock pinion into large support).

Product Features:

Adapter sleeve
Fits Ford 9″
Adapts 28 spline pinion into 35 spline pinion support

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$29.99

You expect a lot from your vehicle, and Spicer Life Series (SPL) universal joints deliver. SPL universal joints consistently outperform competitors, so you can hit the road or trail with confidence. Check out the difference that SPL universal joints can make in your vehicle, and make sure you are getting the longer life, increased bearing capacity and lower maintenance costs that Spicer Life Series (SPL) can provide.

Most Sold 1977 Mercury Comet Differentials

Explore our best-selling Mercury parts for the 1977 Comet among 354 OEM and aftermarket options starting from $1.99.

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from

$13.79

Product Features:

CONSISTENT PERFORMANCE: Matched cup and cone components ensure consistent performance
PREMIUM MATERIALS: Precision manufactured using premium-grade steel for outstanding durability and performance
SMOOTH ROTATION: Crowned raceways and rollers for even load distribution
OE-STYLE DESIGN: Engineered to meet OE specifications
COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on

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$12.99

Design type: spring loaded; multi-lip
Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
Good low temperature capability
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

from

$2.99

Product Features:

CRUSH SLEEVE 7.25 & 8.25 MIN ORDER 5000

from

$37.99

Designed to repair damaged, grooved or worn shafts
Durable stainless steel construction for corrosion-free sealing surface that surpasses most original shaft specifications
Ideal for a shaft where indications of seal wear, such as tracks or grooves have developed
Ultra-thin construction (0.01/0.25mm wall thickness) allows original seal size to be used with minimal additional lip loading
Easy to install with removable flange and installation tool

from

$551.99

For vehicles that are driven daily, the Powertrax No-Slip Traction System is the latest design in quiet traction-adding differential technology. It combines the automatic street-friendly smooth operation of a limited-slip differential with the traction performance of a locking differential. The Powertrax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Powertrax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Powertrax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds!The Powertrax® Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Powertrax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.Powertrax® lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.Powertrax® offers three levels of GRIP locking differentials, ranging from the clutch-type GRIP LS with a forged steel case, the gear-driven GRIP PRO and finally the GRIP LOK for extreme traction.Powertrax® = Extreme Traction Systems!

from

$26.99

Value-priced bearing meets all cataloged application requirements.

Product Features:

Brand may vary by location

from

$333.99

Richmond Gear is the leading manufacturer of professional quality, high-performance drivetrain products. Our complete line of products ranges from high performance ring-and-pinion sets for serious street and racing applications to torque-hungry manual transmissions and components. Richmond Gear products have been winners both at the Daytona 500 and U.S. Nationals for decades. WINNERS RUN RICHMOND!

Product Features:

For over 80-years, the Richmond Double-Diamond logo has represented some of the highest quality gears in the racing industry. Winners Run Richmond!
The superior quality of Richmond gearsets is a result of outstanding design, world class manufacturing and an extensive testing process that is performed on all products.
Richmond performance gearsets have been winners for decades at: NHRA, NMRA, NMCA, Daytona 500, WISSOTA and U.S. Nationals.
Richmond Gear is a leading manufacturer of high performance ring and pinion gearsets and drivetrain components, backed by a two year warranty.
Engineered to perform faster and be more reliable, Richmond performance drivetrain products are the result of a continuous research and development program combined with state-of-the-art manufacturing capabilities.

from

$6.99

from

$5.99

Product Features:

Copper washer
Fits Ford 8″ and 9″

from

$5.49

Fel-Pro® gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:

Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
Engineered and manufactured specifically for the repair environment
Unsurpassed quality you can trust
Includes all parts needed to complete the repair

from

$10.99

Crush Sleeve for Model 35, Chrysler 7.25″, 8.25″ Ford 8″ & GM 7.75″. Approx 0.495″ long.

Product Features:

Crush sleeve for AMC Model 35, Chrysler 7.25″ and 8.25″, Ford 8″ and GM 7.75″
0.495″ tall

from

$37.99

Designed to repair damaged, grooved or worn shafts
Durable stainless steel construction for corrosion-free sealing surface that surpasses most original shaft specifications
Ideal for a shaft where indications of seal wear, such as tracks or grooves have developed
Ultra-thin construction (0.01/0.25mm wall thickness) allows original seal size to be used with minimal additional lip loading
Easy to install with removable flange and installation tool

from

$9.99

Crush Sleeve for Model 20, Ford 10.25″, 10.5″, 7.5″, 8.8″, 9 3/8″, 9″ & 9.75″. .480″ long.

Product Features:

Crush sleeve for AMC Model 20, Ford 10.25″, 10.5″, 7.5″, 8.8″, 9″ and 9.75″
0.480″ tall

from

$8.99

Replacement outer oil slinger for Ford 7.5″, 8.8″, 9″, 10.25″, Nissan Titan rear, Dana 44 Rubicon & 44 JK non-Rubicon.

Product Features:

Outer oil slinger for Ford 10.25″, 7.5″, 8.8″ and 9″ also Jeep JK and Nissan Titan rear

from

$5.99

Ford 8″ & 9″ standard Open, AG, & Detroit locker ring gear bolt. 7/16″ head, .925″ long.

Product Features:

Ring gear bolt for Ford 8″ and 9″
For use with standard open carrier, Auburn Gear limited slip and Detroit Locker
7/16″ head
.925″ long

from

$5.99

Ford 8″ & 9″ standard Open, AG, & Detroit locker ring gear bolt, 1.0″ long, Ford.

Product Features:

Ring gear bolt for Ford 8″ and 9″
For use with standard open carrier, Auburn Gear limited slip and Detroit Locker
1.0″ long

from

$4.99

Ford 8″ & 9″ TracLoc ring gear bolt, 1-1/4″ long.

Product Features:

Ring gear bolt for Ford 8″ and 9″
For use with Trac Loc limited slip
1.25″ long

from

$1.99

Product Features:

BOLT 9″ FORD OPEN R.G. SAME AS M-4216A200

from

$7.99

Pinion nut for Ford 7.5″, 8″, 8.8″, 9 3/8″ & 9″. 1 1/6″ socket, 3/4″ x 20 thread.

Product Features:

Pinion nut for Ford 7.5″, 8″ and 9″
3/4″ x 20 thread
1 1/6″ socket

from

$11.99

9″ Ford gasket.

Product Features:

Dropout gasket
Fits Ford 9″

from

$148.99

Redline Synthetic “Shock Proof” Oil with positraction Additive. 4 Quarts.

Product Features:

Includes four quarts of Redline Shockproof oil and one 4oz bottle of Yukon positraction additive

from

$8.49

Product Features:

PREMIUM MATERIALS: Precision manufactured using premium-grade steel for outstanding durability and performance
SMOOTH ROTATION: Crowned raceways for even load distribution
OE-STYLE DESIGN: Engineered to meet OE specifications
COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on

from

$21.99

8.75″ Chrysler & 9″ Ford preload shim kit.

Product Features:

Preload shim kit for Ford 9″ and Chrysler 8.75″ with ’41’ and ’42’ case housing

from

$5.99

Product Features:

Side gear thrust washer for Ford 8″, Ford 9″ and AMC Model 20
0.030″ thick

Top-Rated Drivetrains Brands For Your 1977 Mercury Comet

Shop for the best-rated brands offering Drivetrains and other products for your 1977 Mercury Comets. Below you’ll find some of our best rated Drivetrains from Moog, National, and Dorman, and more. Drivetrains from these brands that fit a 1977 Comet start at just $6.99 and are rated as high as 4.5 stars. OEM and aftermarket Drivetrains don’t get more top quality, durable, and affordable than from the brands below.

Popular Moog 1977 Mercury Comet Drivetrains

When it comes to maintaining or upgrading your 1977 Mercury Comet, using quality Drivetrains is essential to ensure durability and a perfect fit. Moog ticks all of those boxes. We offer a wide selection of Moog Drivetrains, specifically designed for the 1977 Mercury Comet. With over 3 Moog brand Drivetrains in stock, you’re sure to find what you need. The prices for these top-notch parts start as low as $11.99, with an average price of just $27.32. Plus, with over 112 customer reviews and an average rating of 4.5 stars, you can trust that our Moog Drivetrains will get the job done right. Choose Advance Auto Parts for reliability, quality, and expert-approved parts that keep your vehicle running strong.

from $35.99

(82)

Greaseable Premium Universal Joint

“Great u joints works very well I’ll recomended”

from $33.99

(28)

Non-Greaseable Super Strength Universal Joint

“installed as needed”

from $11.99

(2)

Universal Joint U-Bolt Kit

“quality product”

Popular National 1977 Mercury Comet Drivetrains

National auto parts is one of the highest quality Drivetrain brands in the market. Any 1977 Mercury Comet owner should feel confident when installing genuine National parts in their vehicle. To ensure the best fit and performance for your 1977 Comet, Advance Auto Parts carries a full inventory of 3 National Drivetrains. Plus you will be keeping your Mercury in peak condition while saving money because prices on these National Drivetrains range from $12.99 to $36.49, plus, with more than 20 customer reviews and an impressive 4.3 stars average rating, you can be confident the Fram Drivetrains below will deliver on both quality and value.

from $36.49

(1)

Shaft Repair Sleeve

“Fixed my Ford F-150 4.2. Fit well and installation tool seated the sleeve exactly where it needed to be. Super easy to use and covered the grooved s”

from $12.99

(2)

Multi-Purpose Seal

“Worked great on this 1966 Mustang w/ 8″ rear end.”

from $13.79

(17)

Multi-Purpose Bearing

“Good quality product”

FAQs for 1977 Mercury Comet Drivetrains

Which Drivetrains are best-sellers for 1977 Mercury Comets?

Out of 390 Drivetrains that fit 1977 Mercury Comets, the following parts are the top sellers:

Universal Joint (10265714) – $15.99
Tapered Cone/Cup Wheel Bearing Set (5050723) – $26.99
Driveshaft Flange Bolts (11790354) – $22.49

What’s the price range for 1977 Mercury Comet Drivetrains?

Drivetrain prices for the 1977 Mercury Comet start at $1.99 and go up to $1,211.99 for the most premium parts.

What’s the average price of a Drivetrain for a 1977 Mercury Comet?

The average price for Drivetrains for the 1977 Mercury Comet is $259.46. Keep in mind the variety of part types within our Drivetrain category so you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Drivetrains for other Mercury Comet model years?

Yes, we currently carry Drivetrains for 15 model years of Mercury Comets between 1960 and 1976. Drivetrains are bought most frequently for the following model years: 1976, 1975, 1974, 1973, 1972, 1971, 1969, 1968, and 1967.

What are the cheapest Drivetrains for my 1977 Mercury Comet?

The cheapest 1977 Mercury Comet Drivetrains we carry in stock are:

Ring Gear Bolt (19640279) – $1.99
Differential Crush Sleeve (20520219) – $2.99
Spindle Washer – I.D. 13/16 In. O.D. 1-21/32 In. Thickness 3/32 In. (Sold by each) (22148784) – $2.99
Crush Sleeve (10592883) – $2.99
Trac Loc Ring Gear Bolt Washer For 8" And 9" Ford (11643118) – $3.99

What are the top-rated Drivetrains that fit the 1977 Mercury Comet?

Out of 689 reviews by customers, our 1977 Mercury Comet Drivetrains have an average customer rating of . These are some of the highest-rated Drivetrain types for the 1977 Mercury Comet and their top-rated products:

Differentials
- No-Slip Traction System (10461097) – $551.99
- Shaft Repair Sleeve (3271773) – $37.99
- Multi-Purpose Bearing (3275736) – $13.79
Universal Joints
- No-Slip Traction System (10461097) – $551.99
- Shaft Repair Sleeve (3271773) – $37.99
- Multi-Purpose Bearing (3275736) – $13.79

What types of Drivetrains do you sell for my 1977 Mercury Comet?

As of 11/2/25, these are some of the most in-demand types of Drivetrains for a 1977 Mercury Comet:

Can I get help with 1977 Mercury Comet Drivetrain orders?

Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about Mercury Drivetrains and more.

What is your return policy for Mercury Comet Drivetrains?

Advance Auto Parts keeps returns simple. For new Mercury Comet Drivetrains and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.

1977 Mercury Comet Drivetrains

Yukon Gear – Ford 9" 3.062" Aluminum Case, HD Dropout Housing (Part No.32034)

FAG US – Bearing – TRB (Tapered Roller Bearing) (Part No.KT37)

Dorman – Help – U-Joint Bolt Kit (Part No.81004)

Yukon Gear – Pinion Install Kit For Ford 9" Differential (Part No.13042)

FAG US – Cone (Part No.KL68149)

Yukon Gear – Standard Open Spider Gear Kit For 9" Ford With 31 Spline Axles And 4-Pinion Design (Part No.16034)

Yukon Gear – 9" 31Spline (69-73Mustang & Others) Axle Seal (Part No.30211)

Motive Gear – Differential Pinion Solid Spacer Kit w/Shims (Part No.SS9)

Yukon Gear – Preload Shim Kit For Chrysler 8.75" & Ford 9" (Part No.55030)

Yukon Gear – Redline Synthetic "Shock Proof" Oil With Positraction Additive – 4 Quarts (Part No.15005)

Yukon Gear – Pinion Gear And Thrust Washer For 8" And 9" Ford, Model 20, And 7.25" Chrysler (Part No.33301)

Yukon Gear – Adjuster Lock Bolt 3.062" & 3.250" Ford 9" Drop Out (Part No.32149)

Yukon Gear – Adaptor Washer For 28 Spline Pinion In Oversize Support, For 9" Ford (Part No.32240)

Yukon Gear – 3.062" Side Adjuster For Ford 9" (Part No.32139)

Yukon Gear – Pilot Bearing For Ford 8" (Part No.18043)

USA Standard Gear – Standard Spider Gear Set For Ford 9", 31 Spline, 4-Pinion Design (Part No.39018)

Yukon Gear – Purple Aluminum Pinion Supprt For 9" Ford Daytona (Part No.32161)

Yukon Gear – Crush Sleeve (Part No.33085)

Motive Gear – Differential Ring and Pinion (Part No.F9-370)

Yukon Gear – Model 20 & Model 35 Axle Stud 1/2"-20 X 1.625" Length, 0.620" Dia – Knurl (Part No.33181)

Yukon Gear – Copper Washer For Ford 9" & 8" Dropout Housing (Part No.32339)

Yukon Gear – Trac-Loc For Ford 8" With 28 Spline Axles – Aggressive Design (Part No.26001)

FAG US – Cup (Part No.LM48510)

Motive Gear – Differential Gear Install Kit (Part No.F9IK)

Yukon Gear – Good Used Yoke For Ford 8" With A 1310 U/Joint Size (Part No.41047)

Yukon Gear – 9" Ford Pinion Nut, 35 Spline Large Pinion Oversize (Part No.33161)

Motive Gear – Differential Lock Thrust Block (Part No.D3SZ4211A)

Yukon Gear – Ford 8" & 9" Tracloc Ring Gear Bolt (Part No.33044)

Dorman – Help – Driveshaft Flange Bolts (Part No.80992)

Yukon Gear – Mighty Seal (Part No.30214)

Yukon Gear – Fill Plug For Ford 9", 1/2" Thread (Part No.33539)

Yukon Gear – Axle Bearing Retainer For Ford 9", Large Bearing, 1/2" Bolt Holes (Part No.33467)

Yukon Gear – The Carrier Bearing Puller (Part No.56034)

Yukon Gear – Conversion Bearing For Small Bearing Ford 9" Axle In Large Bearing Housing (Part No.18046)

Yukon Gear – Adaptor Washer For 28 Spline Pinion In Oversize Support, For 9" Ford (Part No.32240)

Yukon Gear – Axle Bearing Retainer For Ford 9", Large & Small Bearing, 3/8" Bolt Holes (Part No.33466)

Yukon Gear – Axle Bearing Retainer For Ford 9", Small Bearing, 3/8" Bolt Holes (Part No.33468)

Yukon Gear – Model 20 & Model 35 Axle Stud 1/2"-20 X 1.625" Length, 0.620" Dia – Knurl (Part No.33181)

Dorman – Standard Spindle Nut 13/16 In.-20 Hex Size 1-1/8 In. (sold by each) (Part No.615-074)

Dorman – Spindle Nut 13/16 In.-20 Hex Size 1-1/8 In. (Sold by each) (Part No.615-075)

Dorman – Spindle Washer – I.D. 13/16 In. O.D. 1-21/32 In. Thickness 3/32 In. (Part No.618-013.1)

Dorman – Spindle Washer – I.D. 13/16 In. O.D. 1-21/32 In. Thickness 3/32 In. (Sold by each) (Part No.618-013)

National – Shaft Repair Sleeve (Part No.99187)

National – Multi-Purpose Bearing (Part No.208-LO)

FAG US – Repair Sleeve (Part No.SR3501)

FAG US – Cone (Part No.KL68149)

MOOG Driveline Products – Universal Joint U-Bolt Kit (Part No.534-10)

MOOG Driveline Products – Greaseable Premium Universal Joint (Part No.369)

MOOG Driveline Products – Non-Greaseable Super Strength Universal Joint (Part No.269)

MOOG Driveline Products – Greaseable Super Strength Universal Joint (Part No.280)

Driveworks – Universal Joint (Part No.DW-369)

Dorman – Help – U-Joint Bolt Kit (Part No.81004)

MOOG Driveline Products – Greaseable Premium Universal Joint (Part No.430)

Yukon Gear – 1310 U/Joint With Zerk Fitting On Cross (Part No.42008)

Yukon Gear – 1310 To 1330 Adapter U/Joint (Part No.42005)

MOOG Driveline Products – Non-Greaseable Super Strength Universal Joint (Part No.230)

MOOG Driveline Products – Greaseable Super Strength Universal Joint (Part No.255)

Yukon Gear – 1310 To Mechanics 3R Adapter U/Joint (Part No.42013)

Yukon Gear – 1350 Lifetime Series U/Joint (Part No.42021)

Yukon Gear – 1350 U/Joint With Zerk Fitting (Part No.42010)

Yukon Gear – 1310 Lifetime U/Joint (Part No.42003)

Yukon Gear – 1350 To Mechanics 3R Adaptor U/Joint (Part No.42001)

Yukon Gear – 1.250" Pinion Adaptor Sleeve (Stock Pinion Into Large Support) (Part No.32239)

Spicer – Universal Joint (Part No.5-7439X)

National – Multi-Purpose Bearing (Part No.A-13)

National – Multi-Purpose Seal (Part No.8181NA)

Motive Gear – Differential Crush Sleeve (Part No.3507575)

National – Shaft Repair Sleeve (Part No.99199)

Powertrax – No-Slip Traction System (Part No.9206902800)

Driveworks – Tapered Cone/Cup Wheel Bearing Set (Part No.S-A-35)

Richmond Gear – Differential Ring And Pinion (Part No.49-0111-1)

Motive Gear – Differential Pinion Nut (Part No.379570S)

Yukon Gear – Copper Washer For Ford 9" & 8" Dropout Housing (Part No.32339)

Felpro – Differential Carrier Gasket Oval Shaped 10 Bolt Hole Gasket (Part No.RDS 13270)

Yukon Gear – Crush Sleeve (Part No.33093)

National – Shaft Repair Sleeve (Part No.99181)

Yukon Gear – Crush Sleeve (Part No.33085)

Yukon Gear – Outer Oil Slinger For Ford 7.5", 8.8", 9", 10.25" (Part No.33022)

Yukon Gear – Ford 8" & 9" Standard Open, Ag, & Detroit Locker Ring Gear Bolt (Part No.33058)