1977 Mercury Cougar Differentials

Find your specific 1977 Mercury Cougar original or aftermarket Differentials below. Order your parts online and have delivered to your home or pick up in-store at Advance Auto.

Essential 1977 Mercury Cougar Differentials

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$221.99

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 LM102910 carrier race
Uses Koyo bearings and races
Included are carrier bearings and races, pinion bearings and races, pilot bearing, pinion seal, complete shim kit, ring gear bolts, pinion nut, crush sleeve, thread locker, marking compound with brush and gasket.

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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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$8.49

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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$819.99

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 31 spline axles
Trac Loc positraction
Clutch style positraction
Smooth 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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$9.99

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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$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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$264.99

Product Features:

Fits Ford 9″ with 28 spline pinion
Larger inner pinion bearing reduces gear deflection under high load
Races installed
6061 aluminum
Annodized purple

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$1136.99

The Yukon Grizzly Locker is the ultimate in locking differentials for street, off-road, & drag racing. Grizzly Lockers provide 100% power to both tires, while still allowing for disengagement while negotiating turns. The Yukon Grizzly locker is a mechanical locking differential. It features a forged case and 8620 internals for maximum strength. It’s patented design reduces common locker failures. All units assembled in the USA! All Grizzly Lockers are backed by the best warranty in the business! Yukon covers the replacement unit and covers any collaterally damaged parts and associated labor, up to $2,000!

Product Features:

Fits Ford 8.8″ with 28 spline axles
Patented internal design reduces common locker failures
8620 internals for added strength
Assembled in the USA

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$11.99

Pinion gear thrust washer (0.875″ shaft) for 8.8″ Ford.

Product Features:

Pinion gear thrust washer for Ford 8.8″
0.875″ diameter cross pin shaft applications only

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$57.99

8.8″ Ford 7/8″ diameter Notched cross pin shaft (.875″ for ’86 and newer). This cross pin shaft is not compatible with Powertrax Lock Rights or Spartan Lockers.

Product Features:

Notched cross pin shaft for Ford 8.8″
0.875″ diameter
Not compatible with Spartan Locker or Powertrax Lock Right

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$336.99

Yukon positraction internals for 8.8″ Ford with 28 spline axles. This kit fits Yukon Gura Grip & Eaton positractions. Yukon uses higher quality materials and better techniques than OEM to ensure a longer lasting spider gear set. This kit does not include clutches. All components come with a one year warranty against manufacturing defects.

Product Features:

Spider gear kit
Fits Ford 8.8″ with Yukon Dura Grip positraction with 28 spline axles
Includes two side gears, two pinion gears, cross pin shaft, roll pin and spider gear thrust washers.

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$219.99

Bearing race driver. No return.

Product Features:

Bearing race driver
Fits LM104911 race
All steel construction

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$5.99

This differential crush sleeve is designed to match the fit and function of the original sleeve on specified vehicles, and is engineered for durability and reliable performance.

Product Features:

Direct replacement – this differential crush sleeve is designed to match the fit and function of the original sleeve on specified vehicles.
Required replacement – when servicing the differential
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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$369.99

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 standard rotation Ford 8.8″
8.80″ ring gear diameter
30 spline pinion
10 ring gear bolts
3.31 ratio

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$38.99

8.6″ GM 99-08 PINION Bearing & SEAL KIT .

Product Features:

Pilot bearing
Fits Ford 9″
0.656″ thick

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$126.99

Motive Gear Differential Bearing Kits Include Front & Rear Pinion Bearing, Pinion Seal, Carrier Bearings, Pilot Bearing Where Applicable, Gear Marking Compound, Crush Sleeve, Pinion Nut, Brush, Thread Locking Compound And Cover Gasket Or Rtv

Product Features:

KIT BRG&SL FORD MSTR 8.8

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$1070.00

9″ Yukon 3.250″ aluminum case, HD Drop Out housing, with load bolt. Made from A356-T6 aluminum & featuring a through bolt design, this dropout is rated for up to 1400 horsepower!

Product Features:

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

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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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$14.99

O-ring for 9″ Ford.Yukon Mighty seal.

Product Features:

Pinion support o-ring
Fits Ford 9″

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$4.99

Trac Loc clutch guide for 9″ Ford.

Product Features:

Clutch guide
Fits Ford 8″ and 9″

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$14.99

Valvoline Multi-Vehicle Transfer Case Fluid is a full synthetic product meeting the performance needs for transfer cases recommending Ford XL-12 and GM Auto Trak II specifications or ATF fluids (DEX/MERC, ATF +4, etc).

Product Features:

Recommended for use in most Ford, GM and FCA (Dodge, Jeep) models
Formulated to help prevent gear wear and protect against rust and corrosion
Formulated to deliver enhanced protection against deposits
Helps provide better protection during extreme operating conditions

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$184.99

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 7.5″
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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$5.99

Product Features:

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

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$125.99

Worn or damaged differential end yoke causing driveline vibrations? This direct replacement end yoke matches the original equipment part for a trustworthy repair and reliable performance.

Product Features:

Direct replacement – this differential end yoke matches the fit and construction of the original yoke.
Excellent value – this replacement end yoke offers original equipment quality at a fraction of the price of dealer parts.
Quality materials – this end yoke is machined from cast iron for strength and is precision machined for reliability
Validated fit – this differential end yoke has been tested to confirm accurate fit

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$59.99

Product Features:

Super carrier shim kit for Ford 7.5″, GM 7.5″, 7.625″, 7.6″ IFS, 7.6″ IRS, 7.75″, 8.2″, 8.2″ Buick, Oldsmobile and Pontiac and GM 8.5″ front and rear
Interlocking design makes installation much easier

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$149.99

Product Features:

FULL SPOOL 9″, 28 SPL. LIGHTWEIGHT

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$45.99

from

$156.99

Spindle nut washer for Dana 28, ’92 & down. This replaces Spicer part number 40075.

Product Features:

Spider gear kit
Fit Ford 7.5″ open differential
Includes two side gears, two pinion gears, cross pin shaft, cross pin bolt and spider gear thrust washers.

Popular 1977 Mercury Cougar Differentials Categories

Differential Oil

Rear Differential Cover Gaskets

Differential Open Unit and Components

Differential Bearings

Differential Pinion Pilot Bearings

Differential Carriers

Differential Bearing Kits

Differential Spider Gear Kits

Differential Rebuild Kits

Differential Carrier Shim Kits

Differential Pinion Seals

Differential Clutch Packs

Differential Mini Spools

Differential Ring and Pinions

Differential Cases

Differential End Yokes

Differential Pinion Supports

Differential Spools

Differential Lock Springs

Differential Carrier Bearing Adjusters

Automatic Transmission Differential Cover Gaskets

Differential Pinion Bearing Kits

Differential Ring Gear Bolts

Bearing Race Drivers

Differential Crush Sleeves

Differential Side Bearing Spacers

Differential Pinion Shims

Differential Pinion Shaft Nuts

Differential Gear Install Kits

Differential Cross Pins

Differential Housing O-Rings

Differential Side Gear Thrust Washers

Differential Pinion Gear Thrust Washers

Differential Drive Pinion Gear Bearing Retainer Bolts

Differential Drive Pinion Oil Deflectors

Limited Slip Differential Assemblies

Differential Clutch Pack Clips

Differential Lock Washers

Differential Pinion Bearing Spacers

Differential Bearing Adjuster Nut Lock Bolts

Differential Carrier Bearing Races

Maybe you’re in the middle of a full rebuild of that 1977 Mercury Cougar. Maybe you just need a couple of Differentials. Either way, Advance Auto Parts has 331 different Differentials in our inventory ranging from $1.99 to $1,566.99. That means you can find the exact parts or products you need to keep that 1977 Mercury Cougar running smoothly.

Differentials are only as good as their brand. We stock 13 different brands to make sure you have plenty of trusted parts to choose from for your 1977 Mercury Cougar. Yukon Gear, Dorman, and FELPRO 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 Cougar, but don’t take our word for it – read our customer ratings and reviews and buy with confidence. Out of the 165 reviews in this category, some of the top rated parts include No-Slip Traction System with 5.0 stars and Differential Pinion Nut with 4.0 stars.

So if you’re in the market for aftermarket Differentials to keep your 1977 Mercury Cougar 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 Cougar Last

Simple repair, complete replacement, or a full rebuild. No matter the job, your 1977 Mercury Cougar 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 Cougar the best it can be. Be sure to browse some of our top Differentials brands and parts.

Popular Felpro Differentials

We carry Felpro parts in our stock across Automatic Transmission Differential Cover Gaskets categories, plus more. For a 1977 Mercury Cougar, our most popular Felpro Differentials include:

from $8.49

(9)

Differential Carrier Gasket

Automatic Transmission Differential Cover Gaskets

FAQs for 1977 Mercury Cougar Differentials

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

Out of 331 Differentials for the 1977 Mercury Cougar, the most popular in our inventory are:

from $57.99

This product is not rated

3 Qt – 80W90 Conventional Gear Oil With Posi Additive

Differential Oil

from $5.99

This product is not rated

Pinion Crush Sleeves

Differential Crush Sleeves

from $15.79

(3)

Multi Purpose Seal

Differential Pinion Seals

What are the top-rated 1977 Mercury Cougar Differentials?

Top-rated Differentials for your 1977 Mercury Cougar based on customer reviews/ratings are:

from $551.99

(1)

No-Slip Traction System

“Installed, no issues, works great.”

from $6.49

(1)

Differential Pinion Nut

“If a pinion nut is ever removed from the pinion shaft, it is recommended NOT to reuse it. Replace it with a BRAND NEW nut, even if the old nut is rel”

from $4.29

(1)

Oil Seal

“this seal clams to be for the ford 9 in but it is way to big”

1977 Mercury Cougar Differentials

More 1977 Mercury Cougar Differentials

Essential 1977 Mercury Cougar Differentials

USA Standard Gear – Master Overhaul Kit for the Ford 9" LM102910 Differential (Part No.37033)

Yukon Gear – Fine Thread Pinion Support Bolt (Aftermarket Aluminum Only) For 9" Ford (Part No.33243)

Felpro – Differential Carrier Gasket (Part No.RDS 55074)

Yukon Gear – Trac-Loc For Ford 8" Wtih 31 Spline Axles – Street Design (Part No.26004)

Motive Gear – Differential Pinion Seal (Part No.8181NA)

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

Yukon Gear – Purple Aluminum Pinion Support For 9" Ford Daytona (Part No.32036)

Yukon Gear – Grizzly Locker, Ford 8.8" With 28 Splines (Part No.28034)

Yukon Gear – Pinion Gear And Thrust Washer (0.875" Shaft) For 8.8" Ford (Part No.33299)

Yukon Gear – 8.8" Ford 7/8" Diameter Notched Cross Pin Shaft (.875" For ’86 And Newer) (Part No.33434)

Yukon Gear – Positraction Internals For 8.8" Ford With 28 Spline Axles (Part No.16015)

Yukon Gear – Bearing Race Driver (Part No.56019)

Dorman – Help – Pinion Crush Sleeves (Part No.81056)

Yukon Gear – High Performance Ring & Pinion Gear Set For Ford 8.8" In A 3.31 Ratio (Part No.24351)

Yukon Gear – Pilot Bearing For Ford 9" (Part No.18042)

Motive Gear – Differential Master Bearing Kit – Koyo (Part No.R8.8RMK)

Yukon Gear – 9" 3.250" Aluminum Case, HD Drop Out Housing, With Load Bolt (Part No.32152)

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

Yukon Gear – O-Ring For 9" Ford (Part No.30028)

Yukon Gear – Trac Loc Clutch Guide For 9" Ford (Part No.33250)

Valvoline – Transfer Case Fluid, 1 Quart (Part No.855459)

Yukon Gear – Pinion Install Kit For Ford 7.5" Differential (Part No.13039)

Yukon Gear – Dana 44, Ford 8" / 9", And Model 20 Side Gear Thrust Washer Replacement (Part No.33283)

Dorman – Differential Pinion Yoke Assembly (Part No.697-539)

Yukon Gear – Super Carrier Shim Kit For Ford 7.5", GM 7.5", 8.2" & 8.5" (Part No.55001)

Motive Gear – Differential Spool (Part No.FS9-28LW)

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

USA Standard Gear – Standard Spider Gear Set For Ford 7.5" (Part No.39014)

Popular 1977 Mercury Cougar Differentials Categories