1988 Mercury Cougar Differentials

Name: Trac Loc Spring for Ford 8.8", 28 Spline
Brand: Yukon Gear
SKU: 33515
Price: 63.99 USD

Please Select your Vehicle to See Exact Fit Parts

Keep Your 1988 Mercury Cougar in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1988 Mercury Cougar looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Differential Covers, Rear Differential Cover Gaskets, and Differential Oil. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.

Top-Rated Differentials from Trusted Brands

Looking for a reliable Differential? We’ve got you covered with options from brands you know and trust like Motive Gear, National, and Royal Purple. For example, Motive Gear Differentials start at just $7.99 with an average 4.0 star rating. National and Royal Purple offer similar pricing and quality, backed by strong customer feedback. With over 1,275 reviews and a solid 4 star average, you can shop with confidence knowing other Mercury Cougar owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1988 Mercury Cougar Differential at Advance Auto Parts is around $195.58, with a range that starts at $1.29 and goes up to $1,115.99. With 207 options in stock from 16 trusted brands, finding the right fit is easy. Popular picks like Axle Housing Cover Gasket Rectangular Shaped, 10 Bolt Hole Gasket, Multi-Purpose Seal, and 3 Qt – 80W90 Conventional Gear Oil with Posi Additive start at just $13.29 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Differential, don’t forget to check out other key components like Drive Shafts and Axles and Universal Joints. At Advance Auto Parts, we’re here to help you keep your 1988 Mercury Cougar in peak condition, inside and out.

Looking for the perfect Differential for your 1988 Mercury Cougar? You’re in the right place. Below, you’ll find links to various types of Differentials that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Differentials, ensuring durability and a precise fit for your Mercury Cougar. Whether you’re driving a 1988 model or another popular model year like 1993, 1994, 1995, 1996, 1997, 1999, 2000, 2001, and 2002, we’ve got you covered. Purchasing Differentials from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Differentials that fit your vehicle.

Essential 1988 Mercury Cougar Differentials

from

$63.99

Yukon Gear & Axle manufactures a full line of top quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers and much, much more. For all your differential small parts needs, look no further than Yukon.

Product Features:

Trac Loc spring
Fits 28 spline Ford 8.8

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$262.99

This differential disc kit is a low-cost, time-saving repair solution for the posi-traction function. They are designed to match the fit and performance of the original disc on specific vehicle years, makes and models.

Product Features:

Direct replacement – this differential clutch kit provides the necessary components for repairing the original equipment on specific vehicles
Quality materials – all components are built for reliable longevity and performance
Smart solution – provides original equipment fit and function for a competitive price compared to original manufacturer
Trustworthy quality – backed by team of designers and engineers in the United States

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$339.99

For vehicles that are driven daily, the Power Trax 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 Power Trax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Power Trax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Power Trax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds.

Product Features:

The Power Trax Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Power Trax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.
Power Trax lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.
Power Trax 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.
Power Trax ia an Extreme Traction System

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$61.99

Cross pin shaft
Fits Ford 9″
Chromoly steel for added strength

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$6.49

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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$7.99

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:

Housing stud
Fits Ford 8″ and 9″

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$5.99

Ford 7.5″ & 8.8″ ring gear bolt, standard Open & TracLoc. 7/16″ x 20.

Product Features:

Ring gear bolt for Ford 7.5″ and 8.8″
7/16″ x 20

from

$215.99

Yukon Gear & Axle offers a full line of top quality differential tools to save time and money.

Product Features:

Fits HM89410 race
For accurate installation of bearing races
All-steel construction

from

$883.99

Yukon Gear & Axle tools are made to the highest industry standard.

Product Features:

Works on popular Ford, GM, Chrysler, and many other housings
For differentials with XHD Clamshells
Can accommodate up to one-ton applications
Comes with a handy bench-top stand
This top-quality differential tool is built to last

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

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$483.99

Yukon Gear & Axle clutch kits fit popular GM diffs outfitted with a Yukon Dura Grip positraction unit feature 18 steel clutch plates, ensuring total traction and long-lasting performance.

Product Features:

Clutch kit
Fits Ford 8.8″, 1963-1979 Corvette, GM 12 bolt passenger car and truck, 8.2″, 8.5″ and 8.6″ Dura Grip positraction
18 piece kit
Steel clutches

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$577.99

RngPnn

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$18.99

1310 and 1330 U/bolt kit (2 U-bolts and 4 nuts) for 9″ Ford.

Product Features:

u-joint u-bolt kit
Fits Ford 9″
1310 and 1330 u-joint size
Includes two u-bolts and four nuts

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$11.99

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

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$6.79

This differential pinion shaft lock 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 differential pinion shaft lock bolt matches the fit and function of the factory part on specified years, makes and models
Ideal solution – this 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

$11.99

Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.

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

$123.99

Product Features:

CLUTCH PACK KIT 8.8″ FORD 1 KIT PER UNIT

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$51.99

Yukon Gear & Axle manufactures a full line of top-quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers, and other general maintenance items. For all your differential small parts needs, look no further than Yukon.

Product Features:

Carrier race
Fits Ford 9″
Conversion race to install small bearing carrier into 3.250″ dropout

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$169.99

The National bearing & seal kit includes all the components required to complete the repair.

Product Features:

COMPLETE SOLUTION – Includes everything needed to complete the repair
STRONG AND DURABLE – Controlled heat treatment process for strength and durability
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
Professional technicians know they can depend on National

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$80.99

Product Features:

FORD 9″ CLUTCH PACK KIT NEED ONE PER UNIT

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$42.99

These Yukon replacement diff covers take your rig a step beyond the boring factory look. They are the stock OE design finished in chrome.

Product Features:

Fits Ford 7.5″
Chrome

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$6.99

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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$22.79

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.

Product Features:

FORD 9″ SOLID SPACER KIT

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$547.99

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!

from

$6.99

Yukon 1541H alloy replacement rear axle for Dana 60, 70, and 80, 35 spline. (40″ to 43.5″) Full float axle (8×3.96″ ). Yukon 1541H alloy axles offer a strength increase over stock while retaining a low cost. Yukon 1541H alloy rear axles come with a one year warranty against manufacturing defects. This is a full-floating axle.

Product Features:

35 spline
8 x 3.96″ bolt pattern
Cut to length design fits 40″-43.5″ applications
Fits Dana Spicer 60, 70 and 80

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$26.99

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 limited 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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$59.99

Yukon shim kits are precision machined and tailored for each individual application to ensure you have the right shims for every set up.

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

Popular 1988 Mercury Cougar Differentials Categories

Differential Oil

Rear Differential Cover Gaskets

Differential Open Unit and Components

Differential Covers

Differential Pinion Shaft Lock Bolts

Differential Bearings

Differential Pinion Pilot Bearings

Differential Cover Bolts

Differential Carriers

Differential Bearing Kits

Front Differential Pinion Bearings

Differential Spider Gear Kits

Differential Rebuild Kits

Differential Carrier Shim Kits

Differential Pinion Seals

Differential Disc Kits

Differential Clutch Packs

Differential Mini Spools

Differential Ring and Pinions

Differential End Yokes

Differential Lock Assemblies

Differential Spools

Differential Carrier Bearings

Differential Lock Springs

Rear Housing Cover Gaskets

Differential Pinion Bearing Kits

Complete Differentials

Differential Ring Gear Bolts

Bearing Race Drivers

Differential Pinion Shafts

Differential Carrier Bearing Shims

Differential Crush Sleeves

Differential Side Bearing Spacers

Differential Pinion Shims

Differential Pinion Shaft Nuts

Differential Gear Install Kits

Differential Cross Pins

Differential Side Gear Thrust Washers

Differential Pinion Gear Thrust Washers

Differential Drive Pinion Oil Deflectors

Differential Spider and Pinion Gear Kits

Limited Slip Differential Assemblies

Differential Carrier Bearing Races

Differential Pinion Bearing Spacers

Best-Selling 1988 Mercury Cougar Rear Differential Cover Gaskets

Upgrade your Cougar with one of our 4 best-selling Rear Differential Cover Gaskets.

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from

$12.99

8.8″ Ford cover gasket.

Product Features:

Cover gasket
Fits Ford 8.8″

Performance Differential Gasket - Ford 8.8 Axle

from

$26.99

Spicer performance differential cover gaskets offer all-makes coverage for street, strip, drag, and off-road applications. These gaskets are reusable offering a clean release during replacement. Built with a mechanically and chemically bonder woven steel.

Product Features:

Made to adhere without messy RTV sealant This saves on install time by eliminating the time needed for RTV cure.
Provides no re-torque design with maximum compression and sealing.
Manufactured with proprietary high-density performance material.
Made in the USA.

from

$9.99

7.5″ Ford cover gasket.

Product Features:

Cover gasket
Fits Ford 7.5″

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$4.99

Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:

Meets or exceeds OE specifications

Top-Quality Differential Oil for 1988 Mercury Cougars

Choose a high-quality OEM or aftermarket Differential Oil for Mercury Cougars and enjoy top-notch performance from $12.49.

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from

$45.99

Royal Purple Motor Oil is a specially formulated multi viscocity oil for use in gasoline and diesel engines of all types from cars and trucks to SUVs, motorcycles and boats. Royal Purple(R) Motor Oil with Synerlec(R) additive technology reduces friction, which results in a 1-3 percent increase in horsepower, lowers operating temperatures, provides superior corrosion protection, improves fuel economy, reduces emissions and extends oil life. A.P.I. Certified.

Product Features:

Better wear protection
Increased fuel efficiency
Better protection of the expensive catalytic emission system
Improved compatibility with fuels containing ethanol
Superior corrosion protection
Meets ILSAC GF-5 and Dexos1 performance requirements

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$12.49

Valvoline Full Synthetic MaxLife Multi-Vehicle ATF, the No. 1 ATF product, suitable for use in 95% of vehicles. And now, it’s recommended for most belt & chain-driven continuously variable transmissions (CVT). Featuring advanced additives to prevent the major causes of transmission breakdown, it’s designed to help prevent leaks, reduce wear & tear, and maximize performance. Has improved thermal stability for longer fluid life, better viscosity stability for consistent transmission operation, and frictional enhancements for smooth gear engagements. Valv MaxLife Multi-Vehicle ATF is suitable for most Ford, GM, Toyota, Honda, Nissan, Hyundai, Subaru, BMW, Mercedes, Volvo, VW & Audi vehicles. Recommended for use in: GM DEXRON-II, DEXRON-III, DEXRON-VI, and DEX-CVT; Ford MERCON LV; Toyota/Lexus Type T, T-II, T-IV, WS, CVTF FE, and CVTF TC; Honda/Acura ATF-Z1 and Honda CVT; Nissan/Infiniti Matic-D, Matic-J, Matic-K and Matic-S; Hyundai/Kia SP-II, SP-III, SP-IV and SPH-IV; BMW 7045E, ETL 8072B, LA2634 and LT71141; Allison C-4; Mercedes-Benz NAG-1; Volvo 1161521, 1161540, 97340 and 1273.41; Subaru ATF HP, Lineartronic chain CVT and CVT-II, Lineartronic High Torque CVT, and CV-30; and VW/Audi G-052-025-A2 and G-052-162-A1. CURRENTLY UNABLE TO SHIP THIS PRODUCT TO CUSTOMERS LOCATED IN CALIFORNIA

Product Features:

FOR USE IN 95% OF VEHICLES INCLUDING MOST CVTs in operation with US registered light duty applications
HIGH PERFORMANCE CONDITIONING AGENTS prolong seal elasticity to prevent leaks
IMPROVED DURABILITY & TRANSMISSION LIFE with anti-wear technology to avoid costly repairs
ENHANCED HIGH & LOW TEMP PERFORMANCE supports transmission fluid in all weather situations

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$12.99

High Performance Motor Oil API LICENSED MOTOR OIL Royal Purple High Performance Motor Oil combines premium base oils with proprietary additive technologies to create a high performance synthetic engine oil that optimizes performance and protection. Royal Purple High Performance Motor Oils carry the current API and ILSAC engine oil licenses, as well as the GM dexos1 gasoline engine oil approval. ILSAC GF-6 AND GM DEXOS1 Modern gasoline direct injection (GDI) engines have achieved levels of power and fuel economy never before possible in passenger car engines. As a result, smaller engines operate at much higher loads across all engine speeds. This has caused increased wear in critical areas of the engine, and created a destructive phenomenon called low-speed pre-ignition (LSPI). The unique, state-of-the-art additive technology in Royal Purple High Performance engine oils is designed specifically to address these issues, and help engines maintain performance and reliability.

Product Features:

Better Wear Protection
Increased Protection against Low Speed Pre-Ignition
Increased Fuel Efficiency
Better Protection for Vehicle Exhaust Emissions Equipment
Improved Compatibility with Fuels Containing Ethanol
Superior Corrosion Protection
Made in USA

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$14.99

Valvoline Import Multi-Vehicle Automatic Transmission Fluid is specifically formulated for use in most Toyota, Nissan, Honda and other imported vehicles. It is formulated with all synthetic base stocks and a proprietary additive system to ensure optimal transmission performance in a wide variety of vehicles. Valvoline Import Multi-Vehicle ATF can also be used in many domestic vehicles. It meets requirements of General Motors and Ford vehicles. Recommended for use in the following applications: Ford MERCON, GM DEXRON-II and DEXRON-III, BMW LT 71141 and ETL-7045E, Nissan/Infiniti Nissan ATF, Matic-D, Matic-K and Matic-J, Mitsubishi Diamond SP-II and SP-III, Subaru ATF-HP, Hyundai/ KIA SP-II and SP-III, Toyota/Lexus Type T, T-III and T-IV, Honda/Acura ATF-Z1 (except in CVTs), Mercedes Benz NAG1, Volvo passenger car (except AW-1), and Volkswagen/Audi TL52162. For CVT applications Valvoline recommends Valvoline Full Synthetic CVT Fluid.

Product Features:

Formulated with full-synthetic base stocks and advanced additive technology to meet the challenging demands of automatic transmissions
Enhanced anti-shudder protection for smooth shifting and maximum power transfer
Developed with anti-wear technology to help improve transmission durability
Engineered with a proprietary blend of base oils and advanced additives to provide better oil flow at low temperatures and greater film protection at higher temperatures

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$57.99

Union 76 gear oil is a conventional non-synthetic 80W90 formulation designed for all types of differentials. This kit includes three quarts of oil and a bottle of Yukon Limited Slip Friction modifier that reduces noise and chatter in clutch driven positraction units and limited slip differentials.

Product Features:

Includes three quarts of conventional oil and one 4oz bottle of Yukon positraction additive

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$44.99

Union 76 gear oil is a conventional non-synthetic 80W90 formulation designed for all types of differentials.

Product Features:

Includes three quarts of conventional oil

from

$66.99

Royal Purple HMX SAE 5W-30 High-Mileage Synthetic Motor Oil, 5 quart is specifically designed to minimize wear and restore lost performance in engines with more than 75,000 miles. Formulated with robust zinc/phosphorus anti-wear compounds combined with Royal Purple’s proprietary additive technology Synerlec, HMX is chemically enhanced to revitalize hardened seals, reducing oil consumption common in high-mileage engines. In addition, HMX is fortified with stout detergents to remove engine build-up and deposits, maintain cleanliness and promote engine longevity.

Product Features:

Specifically designed to minimize wear and restore lost performance in engines with more than 75,000 miles
Formulated with robust zinc/phosphorus anti-wear compounds combined with Royal Purple’s proprietary additive technology
HMX is chemically enhanced to revitalize hardened seals, reducing oil consumption common in high-mileage engines
Reduces friction and metal-to-metal contact for peak engine performance
Also provides outstanding oxidation resistance to safely extend oil drain intervals, and an ionic attraction to metal surfaces, providing protection and minimizing wear at start-up

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$148.99

Redline Heavy Shockproof Gear Oil is formulated to provide lasting protection. This kit includes four quarts of oil and a bottle of Yukon Limited Slip Friction modifier that reduces noise and chatter in clutch driven positraction units and limited slip differentials.

Product Features:

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

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$99.99

Redline Heavy Shockproof Gear Oil is formulated to provide lasting protection.

Product Features:

Includes three quarts of Redline Shockproof oil

from

$137.99

Redline Heavy Shockproof Gear Oil is formulated to provide lasting protection.

Product Features:

Includes four quarts of Redline Shockproof oil

Top Picks for 1988 Mercury Cougar Differential Bearings

Invest in one of our 8 durable Differential Bearings for your 1988 Mercury, knowing you’re getting trusted brands and expert craftsmanship.

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from

$11.99

Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.

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

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$17.99

Manufactured with premium-grade steel, National taper bearing sets feature crowned raceways and rollers to ensure even load distribution.

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

from

$27.99

Manufactured with premium-grade steel, National taper bearing sets feature crowned raceways and rollers to ensure even load distribution.

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

from

$21.99

Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.

Product Features:

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

from

$30.99

We develop and produce high-quality roller bearings, spherical bearings, and plain bearings worldwide for a wide range of applications.

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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$12.99

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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$10.99

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

Cross pin bolt for Chrysler 8.25″ and 9.25″ rear, Ford 7.5″ and 8.8″, GM 12 bolt car and truck, 8.5″, 8.25″ IFS, 8.0″, 7.625″, 7.5″ and 7.2″ IFS

Our Top-Rated Rear Housing Cover Gaskets for 1988 Mercury Cougars

Make a smart move for your 1988 Mercury Cougar with our Rear Housing Cover Gasket for $15.99.

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from

$15.99

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 for the sealing repair environment
Validated for fit, form and function
Unsurpassed quality you can trust

Top-Rated Differential Brands For Your 1988 Mercury Cougar

When it comes to finding the perfect Differential for your 1988 Mercury Cougar, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 16 trusted brands. We carry the most popular Differential brands including Royal Purple, National, and Motive Gear, and more, all known for their exceptional customer ratings (average brand rating of 4.8 stars) and competitive prices, as low as $7.99. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1988 Mercury Cougar, providing peace of mind with parts that meet or exceed OEM standards.

Popular Royal Purple 1988 Mercury Cougar Differentials

If you’re looking for a top-quality Differential for your 1988 Mercury Cougar, Advance Auto Parts has exactly what you need with our selection of Royal Purple Differentials. We have 2 Royal Purple Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $12.99 and an average cost of $29.49, you’ll find the perfect Differential for your needs and budget. Royal Purple Differentials for the 1988 Mercury Cougar come highly rated, with over 215 customer reviews and an impressive average rating of 4.8 stars. Choosing a Royal Purple Differential from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.

from $12.99

(82)

High Performance 5W-30 Synthetic Motor Oil, Better Wear Protection, 1 Quart

“I love this product”

from $45.99

(133)

High Performance 5W-30 Synthetic Engine Oil, Better Wear Protection, 5 Quart

“Great products”

Top-Quality National 1988 Mercury Cougar Differentials

For those in search of a high-quality Differential for their 1988 Mercury Cougar, Advance Auto Parts offers a great selection of National Differentials. With 3 National Differentials in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Differentials start at just $11.99, with an average price of $23.99, giving you a range of options to suit your budget. Backed by over 10 customer ratings and an average rating of 4.3 stars, National Differentials provide both reliability and excellent performance. Choosing a National Differential from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.

from $41.99

(1)

Shaft Repair Sleeve

“Very delicate piece, but came shipped quite safely and not damaged. High quality.”

from $11.99

(2)

Bearing Race

“Reasonable price and woks well. front diff 2006 Escalade esv”

from $17.99

(7)

Multi-Purpose Bearing

“Comparable with the Timkens I removed. NATIONAL bearings have lasted decades in many of my other machines.”

FAQs for 1988 Mercury Cougar Differentials

What are the best-selling Differentials for 1988 Mercury Cougars?

Out of 207 Differentials that fit 1988 Mercury Cougars, the following parts are the top sellers:

Axle Housing Cover Gasket Rectangular Shaped, 10 Bolt Hole Gasket (5782406) – $15.99
Multi-Purpose Seal (3268012) – $13.29
3 Qt – 80W90 Conventional Gear Oil with Posi Additive (11645418) – $57.99

What’s the price range for 1988 Mercury Cougar Differentials?

The prices of Differentials for the 1988 Mercury Cougar range from $1.29 up to $1,115.99 for the most premium parts.

What is the average price of a Differential for a 1988 Mercury Cougar?

The average price for Differentials for the 1988 Mercury Cougar is $195.58. Keep in mind the variety of part types within our Differential category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Differentials for other Mercury Cougar model years?

Yes, we carry Differentials for 33 model years of Mercury Cougars between 1967 and 2002. The following model years are the most popular for Differential purchases: 2002, 2001, 2000, 1999, 1997, 1996, 1995, 1994, and 1993.

What are the cheapest Differentials for my 1988 Mercury Cougar?

The cheapest 1988 Mercury Cougar Differentials we carry are:

Differential Ring Gear Bolt (10282257) – $1.29
Ring Gear Bolt (20520509) – $1.99
Differential Cross Shaft (10282201) – $2.99
Differential Crush Sleeve (10282338) – $2.99
Differential Crush Sleeve (10715159) – $3.99

Does Advance Auto Parts sell Differentials for any other 1988 Mercury models?

Yes. We stock Differentials for 4 other popular 1988 Mercury models. Some of the most popular are 1988 Grand Marquis Differentials, 1988 Colony Park Differentials, 1988 Sable Differentials, 1988 Tracer Differentials, and 1988 Topaz Differentials.

What types of Differentials do you sell for my 1988 Mercury Cougar?

As of 6/2/26, these are some of the most in-demand types of Differentials for a 1988 Mercury Cougar:

Can I get help with 1988 Mercury Cougar Differential orders?

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

What is your return policy for Mercury Cougar Differentials?

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

1988 Mercury Cougar Differentials

Yukon Gear – Trac Loc Spring for Ford 8.8", 28 Spline (Part No.33515)

Dorman – Differential Clutch Kit (Part No.697-780)

Powertrax – Differential Lock Assembly (Part No.1810-LR)

Yukon Gear – Chrome Moly Cross Pin Shaft for Mini-Spool for 9" Ford (Part No.32235)

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

Yukon Gear – Dropout Housing Stud For Ford 8" & 9" (Part No.32338)

Yukon Gear – Ford 7.5" & 8.8" Ring Gear Bolt, Standard Open & Tracloc (Part No.33053)

Yukon Gear – Bearing Race Driver for Popular Ford, Gm, Chrysler, and Dana Differentials (Part No.56017)

Yukon Gear – Heavy Duty Carrier Bearing Puller Set (Part No.56072)

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

Yukon Gear – 18 Plate Carbon Clutches, GM 8.2"/GM 8.5"/12T/12P/Ford 8.8"/Cast Iron Vette (Part No.16110)

Richmond Gear – RngPnn (Part No.69-0284-1)

Yukon Gear – 1310 And 1330 U/Bolt Kit (2 U-Bolts And 4 Nuts) For 9" Ford (Part No.41112)

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

Dorman – Help – Differential Shaft Lock Bolt (Part No.81048)

National – Bearing Race (Part No.LM501314)

Motive Gear – Clutch Kit, 8.8" (Part No.F8.8CPK)

Yukon Gear – One (1) Specialty Bearing Race To Adapt Small Bearing Journal Into 3.25" Dropout (Part No.32157)

National – Axle Differential Bearing & Seal Kit (Part No.RA-311)

Motive Gear – Differential Clutch Pack (Part No.F9-CPK)

Yukon Gear – Chrome Cover for 7.5" Ford (Part No.32008)

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

Motive Gear – Differential Pinion Bearing Spacer (Part No.4105)

Powertrax – Grip PRO Traction System (Part No.GT109035)

Yukon Gear – Cover Bolt For Ford 7.5", 8.8" & 9.75" (Part No.33554)

Richmond Gear – Differential Pinion Shaft (Part No.CSPF88L)

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

Yukon Gear – Steel Cover for Ford 8.8" (Part No.32328)

Yukon Gear – Ford OEM Steel Differential Cover (Part No.32364)

Yukon Gear – Chrome Cover for 8.8" Ford (Part No.32009)

Yukon Gear – Chrome Cover for 7.5" Ford (Part No.32008)

Yukon Gear – 8.8" Ford Cover Gasket (Part No.23011)

Spicer – Performance Differential Gasket – Ford 8.8 Axle (Part No.RD52005)

Yukon Gear – 7.5" Ford Cover Gasket (Part No.23009)

Pro-King – Differential Cover Gasket (Part No.762B303)

Royal Purple – High Performance 5W-30 Synthetic Engine Oil, Better Wear Protection, 5 Quart (Part No.51530)

Valvoline – MaxLife Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid, 1 Quart (Part No.VV324)

Royal Purple – High Performance 5W-30 Synthetic Motor Oil, Better Wear Protection, 1 Quart (Part No.01530)

Valvoline – Import Multi-Vehicle Synthetic Automatic Transmission Fluid, 1 Quart (Part No.822389)

Yukon Gear – 3 Qt – 80W90 Conventional Gear Oil with Posi Additive (Part No.15003)

Yukon Gear – 3 Qt – Penzoil 80W90 Conventional Gear Oil (Part No.15002)

Royal Purple – HMX 5W-30 High Mileage Synthetic Motor Oil, Restores Engine Performance, 5 Quart (Part No.11748)

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

Yukon Gear – Redline Synthetic "Shock Proof" Oil – 3 Quarts (Part No.15000)

Yukon Gear – Redline Synthetic "Shock Proof" Oil – 4 Quarts (Part No.15004)

National – Bearing Race (Part No.LM501314)

National – Multi-Purpose Bearing (Part No.A-17)

National – Multi-Purpose Bearing (Part No.A-36)

National – Tapered Roller Bearing Cone (Part No.LM501349)

Schaeffler – Bearing – CRB (Cylindrical Roller Bearing) (Part No.FC67147)

Schaeffler – Cone (Part No.KL68149)

Schaeffler – Cup (Part No.M88010)

Yukon Gear – Cross Pin Bolt (Part No.33067)

Felpro – Axle Housing Cover Gasket Rectangular Shaped, 10 Bolt Hole Gasket (Part No.RDS 55341)