1991 Ford Mustang Differentials

Please Select your Vehicle to See Exact Fit Parts

Keep Your 1991 Ford Mustang in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1991 Ford Mustang 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 Valvoline. For example, Motive Gear Differentials start at just $7.99 with an average 4.0 star rating. National and Valvoline offer similar pricing and quality, backed by strong customer feedback. With over 1,895 reviews and a solid 4 star average, you can shop with confidence knowing other Ford Mustang owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1991 Ford Mustang Differential at Advance Auto Parts is around $298.17, with a range that starts at $1.29 and goes up to $2,064.99. With 228 options in stock from 17 trusted brands, finding the right fit is easy. Popular picks like Axle Housing Cover Gasket Rectangular Shaped, 10 Bolt Hole Gasket, Multi-Purpose Bearing, and 3 Qt – 80W90 Conventional Gear Oil With Posi Additive start at just $15.99 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 1991 Ford Mustang in peak condition, inside and out.

Looking for the perfect Differential for your 1991 Ford Mustang? 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 Ford Mustang. Whether you’re driving a 1991 model or another popular model year like 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, and 2023, 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 1991 Ford Mustang Differentials

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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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$46.99

Side gear with hub for 8″ and 9″ Ford with 28 splines.

Product Features:

Side gear with hub
Fits Ford 8″ and 9″ standard open differential and Trac Loc positraction with 28 spline axles

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$16.49

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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$374.99

Axle Shaft

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$23.99

Product Features:

Brand may vary by location

from

$76.99

Product Features:

Crush sleeve
Fits Ford 9.75″
Conversion crush sleeve to install 2011 and up ring and pinion set into 2000-2010 housing

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$374.99

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
3.73 ratio

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$111.99

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:

FORD 7.5″ MASTER BEARING KIT (TIMKEN)

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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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$36.99

Sealed Power parts provide innovative designs, use leading-edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.

Product Features:

Steel-backed Babbitt lining material
Used in automotive and high-performance
Babbitt is designed to perform under extreme loads without damaging other engine parts
Babbitt is more environmentally friendly than other material
ISO & QS certified manufacturing

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$80.99

Product Features:

FORD 9″ CLUTCH PACK KIT NEED ONE PER UNIT

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$429.99

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″ with35 spline pinion
For oversize applications
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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$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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$64.99

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.

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$16.29

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

Standard Open & TracLoc pinion gear thrust washer for 7.5″ Ford.

Product Features:

Pinion gear thrust washer
Fits Ford 7.5″

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$44.99

3 Qt. Penzoil 80W90 conventional gear Oil.

Product Features:

Includes three quarts of conventional oil

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$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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$98.99

Product Features:

MINI SPOOL 8.8 FORD 28SPL

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$59.99

Product Features:

Super carrier shim kit for Ford 8.8″, GM 12 bolt passenger car and truck, GM 8.0″, 8.6″, 8.6″ IRS and 1963-1979 Corvette
Interlocking design makes installation much easier

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$149.99

Product Features:

FULL SPOOL FORD 9″ 35 SPL. LGT WGT

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$44.99

Differential Pinion

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$59.99

Product Features:

USA Standard Gear heavy-duty cross pin shaft
Fits Ford 8.8″ with 7/8″ cross pin diameter
Works with Spartan Locker or standard open spider gears

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$109.99

Yukon Carrier installation kits are great, low cost kit for carrier changes such as Positraction or locker upgrades. Carrier installation kit for GM 8.2″ & 8.5″ differential. This kit contains carrier bearings, races and shims.

Product Features:

Fits GM 7.5″, 7.625″ 8.2″ and 8.5″
Includes carrier bearings and races and “super” carrier shim kit

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$6.99

Side gear thrust washer (0.750″ shaft) for 8.8″ Ford.

Product Features:

Side gear thrust washer for Ford 8.8″
0.750″ diameter cross pin shaft applications only

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$67.99

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 Dura Grip uses a nodular case and forged 4320 in

Product Features:

Trac Loc spring
Fits Ford 7.5″

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$207.99

8.8″ Ford TracLoc (with long ears–for early models only) clutch set, both sides.

Product Features:

Clutch kit
Fit Ford 8.8″ Trac Loc positraction

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$133.99

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

Product Features:

Meets or exceeds OE specifications

Popular 1991 Ford Mustang Differentials Categories

Differential Oil

Rear Differential Cover Gaskets

Differential Covers

Differential Pinion Shaft Lock Bolts

Differential Bearings

Differential Axle Shafts

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

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

Auxiliary Shaft Bearings

Differential Ring and Pinion Kits

Limited Slip Differential Assemblies

Differential Spider and Pinion Gear Kits

Differential Pinion Bearing Spacers

Differential Bolts

Most Popular Differential Covers for 1991 Ford Mustangs

Enhance your 1991 Ford Mustang with one of the 5 Differential Covers we have in stock, starting at just $42.99.

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$99.99

Yukon outer stub axle for Chrysler 9.25″ front. This axle uses a 1485 u/joint and has 33 splines.

Product Features:

Fits Ford 8.8″
Steel

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$99.99

DiffrlCover

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$74.99

Chrome cover for 8.8″ Ford.

Product Features:

Fits Ford 8.8″
Chrome

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$42.99

Chrome cover for 7.5″ Ford.

Product Features:

Fits Ford 7.5″
Chrome

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$299.99

B&M Cast Aluminum Differential Covers are designed to strengthen the differential by preventing case distortion and ring gear & bearing cap deflection. Constructed of A356.0-T6 aluminum, these rugged covers significantly increase the fluid capacity and dissipate heat much faster than the stock factory unit to prolong the life of your ring and pinion gears. Additional features include an engraved B&M logo, drain and fill port locations, a magnetic drain plug for catching ferrous metal particles, and complete hardware and installation instructions.

Product Features:

Additional Oil Capacity
More Cooling Ability
No Dipstick Modification
Some Include Fluid Pickup Extension
Built-In Drain Plugs
Cast Aluminum

Best-Selling 1991 Ford Mustang Rear Differential Cover Gaskets

Upgrade your Mustang with one of our 5 best-selling Rear Differential Cover Gaskets, earning an average 4.5 stars rating across 121 reviews.

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$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

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$24.29

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.

Product Features:

.047″ thick cellulose/nitrile composite gasket material
Precision die cut
Reusable

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$12.99

8.8″ Ford cover gasket.

Product Features:

Cover gasket
Fits Ford 8.8″

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$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 1991 Ford Mustangs

Choose a high-quality OEM or aftermarket Differential Oil for Ford Mustangs and enjoy top-notch performance from $35.99.

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$35.99

Valvoline MaxLife Multi-Vehicle ATF is a full-synthetic formulation with advanced additives to prevent the major causes of transmission breakdown and help extend transmission life. Developed to help prevent leaks, maximize transmission performance, reduce transmission wear, and maintain smooth shifting longer than conventional fluids. It is suitable for use in a broad range of ATF applications including most Ford, GM, Toyota, Honda, Nissan, Hyundai, BMW, Mercedes, Volvo, VW & Audi. Recommended for use in the following applications: GM DEXRON-II, DEXRON-III, DEXRON-VI, Ford MERCON LV, Toyota/Lexus Type T, T-II, T-IV, WS, Honda/Acura, ATF-Z1, Nissan/Infiniti Matic-D, Matic-J, Matric-K, Matic-S, Hyundai/Kia SP-II, SP-III, SP-IV, SPH-IV, BMW 7045E, ETL 8072B, LA2634, LT71141, Allison C-4, Mercedes Benz NAG-1, Volvo 1161521, 1161540, 97340, 1273.41, and VW/Audi G-052-025-A2, G-052-162-A1. For CVT applications Valvoline recommends Valvoline Full Synthetic CVT Fluid.

Product Features:

Formulated with full-synthetic base oils and long life friction modifiers to help improve smooth shifting, eliminate slippage and shudder, prevent clutch wear and improve drivability longer than conventional fluids
High-performance seal conditioners maintain and preserve the elasticity of seals to help prevent leaks in high mileage transmissions
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

3 Qt. Penzoil 80W90 conventional gear Oil. W/ bottle of Posi additive.

Product Features:

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

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$44.99

3 Qt. Penzoil 80W90 conventional gear Oil.

Product Features:

Includes three quarts of conventional oil

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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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$99.99

Redline Synthetic “Shock Proof” Oil. 3 Quarts.

Product Features:

Includes three quarts of Redline Shockproof oil

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$137.99

Redline Synthetic “Shock Proof” Oil. 4 Quarts.

Product Features:

Includes four quarts of Redline Shockproof oil

Top Picks for 1991 Ford Mustang Differential Bearings

Invest in one of our 6 durable Differential Bearings for your 1991 Ford, knowing you’re getting trusted brands and expert craftsmanship.

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$16.99

National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

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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$10.99

Value-priced bearing meets all cataloged application requirements.

Product Features:

Brand may vary by location

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$27.99

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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$15.99

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

$34.49

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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$21.29

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

Differential Axle Shafts for 1991 Ford Mustangs

Make a smart move for your 1991 Ford Mustang with products all priced from $117.99 to $1,050.00.

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$149.99

The Motive Gear replacement axle shaft offers an OE-quality axle shaft at a fraction of the OE cost. Manufactured from 1541H material on high-tolerance CNC equipment, this axle shaft is designed to provide a perfect fit every time.

Product Features:

AXLE SHAFT 8.8″ 28 SPL. 29 1/4″ 79-93 MUSTANG L & R

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$175.99

USA Standard Axle for ’83-’92 2WD & 4WD Ford Ranger, left hand side. 29 5/32″ long, 5 lug, 28 spline.

Product Features:

Fits 1983-1992 Ford 7.5″ rear in Ford Ranger
Left hand side
28 spline
29 5-32″ long
5 lug

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$1050.00

Product Features:

28 spline
4 lug
Fits Ford 8.8″ in 1979-1993 Mustang
Includes Dura Grip positraction, carrier bearings and races, carrier shims, axle bearings and seal and studs

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$954.99

Product Features:

31 spline
5 lug
Fits Ford 8.8″ in 1979-1993 Mustang
Includes Dura Grip positraction, carrier bearings and races, carrier shims, axle bearings and seal and studs

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$899.99

Product Features:

28 spline
5 lug
Fits Ford 8.8″ in 1979-1993 Mustang
Includes Dura Grip positraction, carrier bearings and races, carrier shims, axle bearings and seal and studs

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$889.99

Product Features:

31 spline
4 lug
Fits Ford 8.8″ in 1979-1993 Mustang
Includes Dura Grip positraction, carrier bearings and races, carrier shims, axle bearings and seal and studs

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$241.99

Pro-King is the leading supplier of transmission and driveline products in the aftermarket. All products are designed to meet or exceed OE quality, form, fit and function.

Product Features:

Meets or exceeds OE specifications
Dual heat treating process

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$234.99

Yukon 1541H alloy 4 lug rear axle for 7.5″ and 8.8″ Ford Thunderbird, Cougar, or Mustang with a length of 29-1/4″ inches and 28 splines. 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 C-clip axle.

Product Features:

Fits 1979-1993 Mustang, Thunderbird and Cougar
28 spline
29 1/4″ long
4 lug
Will not work in Mustang Cobra applications

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$234.99

Yukon 1541H alloy 5 lug left hand rear axle for 7.5″ and 8.8″ Ford Ranger (right hand for Aerostar) with a length of 29-5/32″ inches and 28 splines. 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 C-clip axle.

Product Features:

Fits 1983-1992 Ford 7.5″ rear in Ford Ranger
Left hand side
28 spline
29 5-32″ long
5 lug

from

$181.99

Pro-King is the leading supplier of transmission and driveline products in the aftermarket. All products are designed to meet or exceed OE quality, form, fit and function.

Product Features:

Meets or exceeds OE specifications
Dual heat treating process

from

$177.99

USA Standard axle for Ford Mustang, Thunderbird & Cougar. 29 1/4″ long, 28 spline, 4 lug.

Product Features:

28 spline
4 lug
29.25″ long
Fits Ford 7.5″ and 8.8″ in 1979-1993 Mustang

from

$117.99

Axle shaft damaged or bearings worn out. This axle shaft directly replaces the original equipment on certain vehicles, complete with all necessary application-specific installation components.

Product Features:

Direct replacement – this axle shaft replaces the original equipment on specific vehicle years, makes and models
Complete kit – each shaft includes critical installation hardware and components needed for specific vehicle applications
Durable construction – designed to rigorous standards and tested to ensure performance
Trustworthy solution – backed by team of engineers and quality control specialists in the United States

Top-Rated Differential Brands For Your 1991 Ford Mustang

When it comes to finding the perfect Differential for your 1991 Ford Mustang, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 17 trusted brands. We carry the most popular Differential brands including Valvoline, 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 1991 Ford Mustang, providing peace of mind with parts that meet or exceed OEM standards.

Popular Valvoline 1991 Ford Mustang Differentials

If you’re looking for a top-quality Differential for your 1991 Ford Mustang, Advance Auto Parts has exactly what you need with our selection of Valvoline Differentials. We have 1 Valvoline Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $35.99, you’ll find the perfect Differential for your needs and budget. Valvoline Differentials for the 1991 Ford Mustang come highly rated, with over 446 customer reviews and an impressive average rating of 4.8 stars. Choosing a Valvoline Differential from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.

from $35.99

(446)

MaxLife Multi-Vehicle Automatic Transmission Fluid, 1 Gallon

“Good quality great price”

Top-Quality National 1991 Ford Mustang Differentials

For those in search of a high-quality Differential for their 1991 Ford Mustang, 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 $15.66, giving you a range of options to suit your budget. Backed by over 34 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 $17.99

(7)

Multi-Purpose Bearing

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

from $16.99

(25)

Multi-Purpose Bearing

“Smooth”

from $11.99

(2)

Bearing Race

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

FAQs for 1991 Ford Mustang Differentials

What are the best-selling Differentials for 1991 Ford Mustangs?

Out of 228 Differentials that fit 1991 Ford Mustangs, the following parts are the top sellers:

Axle Housing Cover Gasket Rectangular Shaped, 10 Bolt Hole Gasket (5782406) – $15.99
Multi-Purpose Bearing (3275973) – $16.99
3 Qt – 80W90 Conventional Gear Oil With Posi Additive (11645418) – $57.99

What’s the price range for 1991 Ford Mustang Differentials?

The prices of Differentials for the 1991 Ford Mustang range from $1.29 up to $2,064.99 for the most premium parts.

What is the average price of a Differential for a 1991 Ford Mustang?

The average price for Differentials for the 1991 Ford Mustang is $298.17. 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 Ford Mustang model years?

Yes, we carry Differentials for 55 model years of Ford Mustangs between 1964 and 2025. The following model years are the most popular for Differential purchases: 2023, 2022, 2021, 2020, 2019, 2018, 2017, 2016, and 2015.

What are the cheapest Differentials for my 1991 Ford Mustang?

The cheapest 1991 Ford Mustang Differentials we carry are:

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

Does Advance Auto Parts sell Differentials for any other 1991 Ford models?

Yes. We stock Differentials for 51 other popular 1991 Ford models. Some of the most popular are 1991 E-250 Econoline Differentials, 1991 E-350 Econoline Differentials, 1991 E-150 Econoline Differentials, 1991 Thunderbird Differentials, and 1991 F-350 Differentials.

What types of Differentials do you sell for my 1991 Ford Mustang?

As of 3/1/26, these are some of the most in-demand types of Differentials for a 1991 Ford Mustang:

Can I get help with 1991 Ford Mustang Differential orders?

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

What is your return policy for Ford Mustang Differentials?

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

1991 Ford Mustang Differentials

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

Yukon Gear – Side Gear With Hub For 8" And 9" Ford With 28 Splines (Part No.16163)

Schaeffler – Bearing – TRB (Tapered Roller Bearing) (Part No.KT4)

Yukon Gear – Axle Shaft (Part No.21500)

Driveworks – Camshaft Seal (Part No.S-99139)

Yukon Gear – Conversion Crush Sleeve To Install ’11 & Newer Ford 9.75" Ring & Pinion Set Into ’10 & Down Housing (Part No.33545)

Yukon Gear – High Performance Ring & Pinion Gear Set For Ford 8.8" In A 3.73 Ratio (Part No.24096)

Motive Gear – Differential Master Bearing Kit – Timken (Part No.R7.5FRMKT)

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

Sealed Power – Engine Auxiliary Shaft Bearing Set (Part No.1881M)

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

Yukon Gear – Pinion Install Kit For Ford 9" Differential, 35 Spline, Oversize (Part No.13053)

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

Richmond Gear – Differential Cross Shaft (Part No.80-0273-1)

Schaeffler – General Seal (Part No.SS2257)

Yukon Gear – Standard Open & Tracloc Pinion Gear And Thrust Washer For 7.5" Ford (Part No.33296)

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

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

Motive Gear – Differential Mini Spool (Part No.MS88-28)

Yukon Gear – Super Carrier Shim Kit For Ford 8.8", GM 12 Bolt Car & Truck, 8.6 & Vette (Part No.55002)

Motive Gear – Differential Spool (Part No.FS9-35LW)

Yukon Gear – Differential Pinion (Part No.33577)

USA Standard Gear – 8.8" Ford Spartan Locker Cross Pin, 31 Spline Only (Part No.17020)

Yukon Gear – 8.5" & 8.2" GM Carrier Installation Kit (Part No.57008)

Yukon Gear – Side Gear And Thrust Washer (0.750" Shaft) For 8.8" Ford (Part No.33298)

Yukon Gear – Trac Loc Spring For Ford 7.5" (Part No.33514)

Yukon Gear – 8.8" Ford Tracloc Clutch Set, Both Sides (Part No.16017)

Pro-King – Differential Clutch Pack (Part No.762B119)

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

Yukon Gear – DiffrlCover (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)

B & M – Rear End Cover 1 EA B&M (Part No.40297)

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

Mr. Gasket – Differential Gasket (Part No.142)

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

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

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

Valvoline – MaxLife Multi-Vehicle Automatic Transmission Fluid, 1 Gallon (Part No.773775)

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)

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 – Multi-Purpose Bearing (Part No.A-6)

Driveworks – Taper Bearing Cone (Part No.S-LM-501349)

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

National – Bearing Race (Part No.362A)

Schaeffler – Bearing – TRB (Tapered Roller Bearing) (Part No.KT36)

Schaeffler – Bearing – TRB (Tapered Roller Bearing) (Part No.KT5)

Motive Gear – Axle Shaft (Part No.MG1231)

USA Standard Gear – Axle For ’83-’92 2WD & 4WD Ford Ranger, Left Hand Side (Part No.35007)

Yukon Gear – 79-’93 Mustang Axle Kit, 28 Spline, 4 Lug Axles With Duragrip Positraction (Part No.21554)

Yukon Gear – 79-’93 Mustang Axle Kit, 31 Spline, 5 Lug Axles With Duragrip Positraction (Part No.21557)

Yukon Gear – 79-’93 Mustang Axle Kit, 28 Spline, 5 Lug Axles With Duragrip Positraction (Part No.21556)

Yukon Gear – 79-’93 Mustang Axle Kit, 31 Spline, 4 Lug Axles With Duragrip Positraction (Part No.21555)

Pro-King – Rear Axle Shaft Kit (Part No.AXK-212)

Yukon Gear – 1541H Alloy 4 Lug Rear Axle For 7.5" And 8.8" Ford Thunderbird, Cougar, Or Mustang (Part No.21179)

Yukon Gear – 1541H Alloy 5 Lug Left Hand Rear Axle For 7.5" And 8.8" Ford Ranger (Part No.21181)

Pro-King – Rear Axle Shaft Kit (Part No.AXK-279)

USA Standard Gear – Axle For Ford Mustang, Thunderbird & Cougar (Part No.35105)

Dorman – Rear Axle Shaft, Left Or Right (Part No.630-228A)