1977 Mercury Comet Differentials

Essential 1977 Mercury Comet Differentials

Yukon Gear – Master Overhaul Kit For Ford 8" Differential (Part No.14047)

Master Overhaul Kit For Ford 8" Differential

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$302.99
Yukon Master Overhaul kits give you all the high quality parts you need to start & finish every differential job. Yukon offers more tailor-made kits than any other manufacturer in the industry to meet your specific installation needs. This kit uses Timken bearings and races along with high quality seals and small parts. Included in this kit are carrier bearings and races, pinion bearings and races, pinion seal, complete shim kit, ring gear bolts, pinion nut, crush sleeve (if applicable), oil baffles and slingers (if applicable), Thread locking compound, marking compound with brush, and gasket. Yukon’s Master Overhaul kits are the most comprehensive and complete kits on the market. They do extensive research to ensure that every kit is specially tailored to your application.

Product Features:
  • Fits Ford 8″
  • Included are Timken bearings and races, pinion bearings and races, pinion seal, complete shim kit, ring gear bolts, pinion nut, crush sleeve , thread locker, marking compound with brush, and gasket.
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Richmond Gear – Differential Cross Shaft (Part No.CSPF9)

Differential Cross Shaft

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$26.49
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.
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Yukon Gear – One (1) Specialty Bearing Race To Adapt Small Bearing Journal Into A 3.250" Dropout (Part No.32157)

One (1) Specialty Bearing Race To Adapt Small Bearing Journal Into A 3.250" Dropout

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$51.99
One (1) specialty bearing race to adapt small bearing journal into a 3.250″ dropout. This adapter allows the use of a 28 or 31 spline carrier, positraction or locker in a 3.250″ dropout. This is a perfect solution if you are currently running 28 or 31 spline axles but are looking to upgrade to 35 spline later, or are stepping down from 35 spline but don’t want to buy a new dropout.

Product Features:
  • Carrier race
  • Fits Ford 9″
  • Conversion race to install small bearing carrier into 3.250″ dropout
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Motive Gear – Differential Pinion Nut (Part No.379570S)

Differential Pinion Nut

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$6.49
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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Yukon Gear – 7.25" Ford Crush Sleeve – 2.00" Long (Part No.33084)

7.25" Ford Crush Sleeve - 2.00" Long

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$34.99
7.25″ Ford crush sleeve. 2.00″ long.

Product Features:
  • Crush sleeve
  • Fits Ford 7.5″
  • 2.00″ tall
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Yukon Gear – Pinion Install Kit For Ford 8" Differential (Part No.13040)

Pinion Install Kit For Ford 8" Differential

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$251.99
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, 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 8″
  • Included are pinion bearings and races, pinion seal, pinion nut, crush sleeve, complete pinion shim kit, and marking compound with brush.
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Yukon Gear – Outer Oil Slinger For Ford 7.5", 8.8", 9", 10.25" (Part No.33022)

Outer Oil Slinger For Ford 7.5", 8.8", 9", 10.25"

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$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
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Yukon Gear – High Performance Ring & Pinion Gear Set For Ford 9" In A 5.29 Ratio (Part No.24387)

High Performance Ring & Pinion Gear Set For Ford 9" In A 5.29 Ratio

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$409.99
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 the latest designs and manufacturing technologies to provide a quiet running gear that is strong and easy to set up. All Yukon ring & pinion sets come standard with a one-year warranty.

Product Features:
  • Fits Ford 9″
  • 9.00″ ring gear diameter
  • 28 spline pinion
  • 10 ring gear bolts
  • 5.29 ratio
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Yukon Gear – Dana 44, Ford 8" / 9", And Model 20 Side Gear Thrust Washer Replacement (Part No.33283)

Dana 44, Ford 8" / 9", And Model 20 Side Gear Thrust Washer Replacement

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$5.99
Product Features:
  • Side gear thrust washer for Ford 8″, Ford 9″ and AMC Model 20
  • 0.030″ thick
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Yukon Gear – Steel Spool For Ford 9" With 40 Spline Axles (Part No.32182)

Steel Spool For Ford 9" With 40 Spline Axles

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$389.99
Yukon Performance 2-3/16″ deck steel spool for 9″ Ford with 40 spline axles. Spool uses 2″ journal bearings (45 degree). Yukon performance spools are made from the highest quality materials to ensure high strength and long life in performance applications. Spools provide 100% power to both tires at all times and are a lower cost alternative to lockers. Spools are not recommended for street driven vehicles. Yukon Performance spools come with a one year warranty against manufacturing defects.

Product Features:
  • Fits Ford 9″ with 40 spline axles
  • Provides 100% traction to both wheels at all times
  • Not recommended for street driven vehicles
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Yukon Gear – Standard Open Or Tracloc Cross Pin Shafts And Block In Four Pinion Design For 9" Ford (Part No.33333)

Standard Open Or Tracloc Cross Pin Shafts And Block In Four Pinion Design For 9" Ford

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$207.99
Standard open or TracLoc cross pin shafts and block in four pinion design for 9″ Ford.

Product Features:
  • Cross pin shaft and block kit
  • Fits Ford 9″
  • Includes cross pin block and three cross pin shafts
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USA Standard Gear – Master Overhaul Kit for the Ford 9" LM603011 Differential with Daytona Pinion Support (Part No.37039)

Master Overhaul Kit for the Ford 9" LM603011 Differential with Daytona Pinion Support

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$249.99
USA Standard Master Overhaul kits let you finish your install with confidence. This kit uses Koyo bearings and races. Included are carrier bearings and races, pinion bearings and races, pinion seal, complete shim kit, ring gear bolts, pinion nut, crush sleeve (if applicable), oil baffles and slingers (if applicable), threading locking compound, marking compound with brush and gasket.

Product Features:
  • Fits Ford 9″ with LM104911 carrier races and Daytona pinion support
  • Uses Koyo bearings and races
  • Included are carrier bearings and races, pinion bearings and races, pinion seal, complete shim kit, ring gear bolts, pinion nut, crush sleeve eliminator, pilot bearing, thread locker, marking compound with brush and gasket.
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Yukon Gear – The Carrier Bearing Puller (Part No.56034)

The Carrier Bearing Puller

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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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Powertrax – Grip LS Traction System (Part No.LS108028)

Grip LS Traction System

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$451.99
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!
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Yukon Gear – 8" Ford O-Ring (Part No.30027)

8" Ford O-Ring

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$9.99
8″ Ford O-ring.

Product Features:
  • Pinion support o-ring
  • Fits Ford 8″
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Mr. Gasket – Rear End Gasket – Ford 9" – Blend Of Nitrile Rubber And Fiber For Excellent Sealing And Durability (Part No.82)

Rear End Gasket - Ford 9" - Blend Of Nitrile Rubber And Fiber For Excellent Sealing And Durability

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$21.79
Mr. Gasket Axle Housing/Differential Cover or Rear End Gaskets are manufactured from a .047 inch thick cellulose/nitrile composite gasket material for excellent sealing and durability. They are precision die-cut for an excellent fit. Fits 1957-1981 Ford 10 bolt 9 inch ring gear.

Product Features:
  • .047″ thick cellulose/nitrile composite gasket material
  • Precision die cut
  • Reusable
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Yukon Gear – Fine Thread Pinion Support Bolt (Aftermarket Aluminum Only) For 9" Ford (Part No.33243)

Fine Thread Pinion Support Bolt (Aftermarket Aluminum Only) For 9" Ford

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$5.99
Fine thread pinion support bolt (aftermarket aluminum only) for 9″ Ford.

Product Features:
  • Pinion support bolt for Ford 9″
  • 3/8″ x 24 thread
  • 1.5″ long
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Felpro – Differential Carrier Gasket (Part No.RDS 13270)

Differential Carrier Gasket

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$4.49
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Unsurpassed quality you can trust
  • Validated for fit, form and function
  • Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes
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Yukon Gear – Adjuster Lock Bolt 3.062" & 3.250" Ford 9" Drop Out (Part No.32149)

Adjuster Lock Bolt 3.062" & 3.250" Ford 9" Drop Out

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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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Yukon Gear – Pilot Bearing Retainer For Ford 9" (Part No.33255)

Pilot Bearing Retainer For Ford 9"

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$11.99
Pilot bearing retainer for Ford 9″.

Product Features:
  • Pilot bearing retainer for Ford 9″
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Yukon Gear – Flat Side Gear Without Hub For 9" Ford With 31 Splines (Part No.16162)

Flat Side Gear Without Hub For 9" Ford With 31 Splines

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$46.99
Flat side gear without hub for 9″ Ford with 31 splines.

Product Features:
  • Side gear without hub
  • Fits Ford 8″ and 9″ Trac Loc positraction with 31 spline axles
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Motive Gear – Differential Pinion Solid Spacer Kit w/Shims (Part No.4105)

Differential Pinion Solid Spacer Kit w/Shims

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$22.79


Product Features:
  • FORD 9″ SOLID SPACER KIT
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Motive Gear – Differential Mini Spool (Part No.MS9-31)

Differential Mini Spool

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$31.99


Product Features:
  • MINI SPOOL 8″ & 9″ 31 SPLN STL 090431
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Yukon Gear – Redline Synthetic "Shock Proof" Oil With Positraction Additive – 4 Quarts (Part No.15005)

Redline Synthetic "Shock Proof" Oil With Positraction Additive - 4 Quarts

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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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Yukon Gear – Star Washers, 3.250" Ford 9" Drop Out New Design Only (Part No.32144)

Star Washers, 3.250" Ford 9" Drop Out New Design Only

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$4.99
STAR washers, 3.250″ Yukon Ford 9″ Drop Out new design ONLY.

Product Features:
  • Star washer
  • Fits Ford 9″
  • 3.250″ designs only
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Motive Gear – Differential Pinion Shaft Support Block (Part No.D3SZ4211A)

Differential Pinion Shaft Support Block

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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 o
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National – Shaft Repair Sleeve (Part No.99181)

Shaft Repair Sleeve

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$37.49
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
  • Installation tool reduces sleeve distortion and allows for installation without removal from the shaft
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Yukon Gear – Pilot Bearing For Ford 8" (Part No.18043)

Pilot Bearing For Ford 8"

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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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1977 Mercury Comet Differentials

Maybe you’re in the middle of a full rebuild of that 1977 Mercury Comet. Maybe you just need a couple of Differentials. Either way, Advance Auto Parts has 356 different Differentials in our inventory ranging from $1.99 to $1,211.99. That means you can find the exact parts or products you need to keep that 1977 Mercury Comet running smoothly.

Differentials are only as good as their brand. We stock 11 different brands to make sure you have plenty of trusted parts to choose from for your 1977 Mercury Comet. Driveworks, Yukon Gear, and National are just some of the brands we stock. Search for brands you know or compare prices and reviews to help you decide!

We know you’ll find the perfect Differentials for your 1977 Mercury Comet, but don’t take our word for it – read our customer ratings and reviews and buy with confidence. Out of the 66 reviews in this category, some of the top rated parts include Differential Crush Sleeve with 5.0 stars.

So if you’re in the market for aftermarket Differentials to keep your 1977 Mercury Comet rolling for years to come, look no further. Shop online and have your products shipped direct to your door, or pick up at the nearest Advance Auto Parts location today!

Differentials Brands To Make Your 1977 Mercury Comet Last

Simple repair, complete replacement, or a full rebuild. No matter the job, your 1977 Mercury Comet demands trusted brand parts and products to keep it running. Many trusted brands of Differentials make up Advance Auto Parts’ inventory, and all are ready to help make your Comet the best it can be. Be sure to browse some of our top Differentials brands and parts.

Popular National Differentials

We carry National parts in our stock across Differential Pinion Seals and Differential Pinion Pilot Bearings categories, plus more. For a 1977 Mercury Comet, our most popular National Differentials include:
Multi Purpose Seal
from $11.79
(2)
Multi Purpose Seal
Differential Pinion Seals
Shaft Repair Sleeve
from $37.99
(1)
Shaft Repair Sleeve
Differential Pinion Pilot Bearings
Bearings
from $18.79
(3)
Bearings
Front Differential Pinion Bearings

Top 1977 Mercury Comet Differentials from Driveworks

Driveworks products are another trusted brand when it comes to Differentials for your 1977 Mercury Comet. Popular Driveworks parts include:
Tapered Cone/Cup Wheel Bearing Set
from $13.99
(14)
Tapered Cone/Cup Wheel Bearing Set
Differential Bearings

FAQs for 1977 Mercury Comet Differentials

What are the most purchased Differentials for the 1977 Mercury Comet?

Out of 356 Differentials for the 1977 Mercury Comet, the most popular in our inventory are:
3 Qt - Penzoil 80W90 Conventional Gear Oil
from $44.99
This product is not rated
3 Qt – Penzoil 80W90 Conventional Gear Oil
Differential Oil
Copper Washer For Ford 9" & 8" Dropout Housing
from $5.99
This product is not rated
Copper Washer For Ford 9" & 8" Dropout Housing
Complete Differentials
Differential Pinion Nut
from $6.49
(1)
Differential Pinion Nut
Differential Pinion Shaft Nuts

What are the top-rated 1977 Mercury Comet Differentials?

Top-rated Differentials for your 1977 Mercury Comet based on customer reviews/ratings are:
Differential Crush Sleeve
from $2.49
(1)
Differential Crush Sleeve
“High quality, would buy again”