1978 AMC AMX Differentials

Please Select your Vehicle to See Exact Fit Parts

Keep Your 1978 AMC AMX in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1978 AMC AMX looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Differential Bearings, Differential Pinion Seals, 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 National, Driveworks, and Valvoline. For example, National Differentials start at just $11.99 with an average 4.3 star rating. Driveworks and Valvoline offer similar pricing and quality, backed by strong customer feedback. With over 1,491 reviews and a solid 5 star average, you can shop with confidence knowing other AMC AMX owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1978 AMC AMX Differential at Advance Auto Parts is around $140.20, with a range that starts at $1.99 and goes up to $1,566.99. With 41 options in stock from 9 trusted brands, finding the right fit is easy. Popular picks like Multi-Purpose Bearing, 3 Qt – 80W90 Conventional Gear Oil With Posi Additive, and 3 Qt – Penzoil 80W90 Conventional Gear Oil start at just $16.99 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 1978 AMC AMX in peak condition, inside and out.

Looking for the perfect Differential for your 1978 AMC AMX? 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 AMC AMX. Whether you’re driving a 1978 model or another popular model year like 1968, 1969, 1970, 1979, and 1980, 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 1978 AMC AMX Differentials

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$15.99

Model 20 gasket.

Product Features:

Cover gasket
Fits AMC Model 20

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$1.99

Product Features:

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

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$88.99

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 & SEAL AMC MODEL 20

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$137.99

Redline Synthetic “Shock Proof” Oil. 4 Quarts.

Product Features:

Includes four quarts of Redline Shockproof oil

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$187.99

Product Features:

DANA-35 R/P 4.56 STD

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$215.99

Bearing race driver. No return.

Product Features:

Bearing race driver
Fits M802011 race
All steel construction

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$81.99

Product Features:

DANA-35 MINI INSTALL KIT JEEP

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$10.99

Replacement pinion nut for Model 20 & 35, Dana 30 JK, 44 JK front, Ford 10.25″, 10.5″ & some 9.75″. 7/8-20 thread, 1 1/8 socket.

Product Features:

Pinion nut for Jeep JK front, Jeep Liberty front, Ford 9.75″, 10.25″, 10.5″ and AMC Model 20 and Model 35
7/8″ x 20 thread
1 1/8″ socket

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$9.99

Pinion seal for Model 20 and Model 35.Yukon Mighty seal.

Product Features:

Pinion seal
Fits AMC Model 20 and AMC Model 35

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$17.49

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

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$8.29

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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$10.49

Product Features:

SOLID SPACER FORD 8.8″ & 9″

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$22.79

Product Features:

FORD 9″ SOLID SPACER KIT

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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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$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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$526.69

For vehicles that are driven daily, the Powertrax No-Slip Traction System is the latest design in quiet traction-adding differential technology. It combines the automatic street-friendly smooth operation of a limited-slip differential with the traction performance of a locking differential. The Powertrax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Powertrax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Powertrax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds!

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$17.99

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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$153.99

M802048 set-up bearing (one bearing). No return.

Product Features:

Set up bearing
Fits M802048 pinion bearing
Easily slips on and off pinion journal to allow for easier pinion depth adjustment

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$16.99

Product Features:

PINION SHIM-DANA 30,35.50

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$27.99

8.25″ IFS, 8.5″, 12P, 7.5″ F, 8.8″ F, 8.25″ Chrysler pinion shim kit.

Product Features:

Pinion depth shims for GM 8.25″ IFS, 8.5″, 8.6″, 12 bolt passenger car, Ford 7.5″ and 8.8″, Chrysler 8.25″

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$29.99

20 long air line for Zip Locker.

Product Features:

Air line
20′ in length

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$27.99

Product Features:

Bulkhead fitting

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$275.99

Yukon standard open spider gear kit for Model 35 with 27 spline axles. hubs have 1.625″ diameter (used in ’93 and older models). Yukon uses higher quality materials and better techniques than OEM to ensure a longer lasting spider gear set. All components come with a one year warranty against manufacturing defects.

Product Features:

Spider gear kit
Fits AMC Model 35 open differential with 1.620″ side gear bore
Includes two side gears, two pinion gears, cross pin shaft, cross pin bolt and spider gear thrust washers.

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$462.99

Yukon positraction internals for Model 35 with 27 spline axles. Yukon uses higher quality materials and better techniques than OEM to ensure a longer lasting spider gear set. This kit includes clutches. All components come with a one year warranty against manufacturing defects.

Product Features:

Spider gear kit
Fits AMC Model 35 Trac Loc positraction
Includes two side gears, two pinion gears, cross pin shaft, cross pin bolt, clutches, and spider gear thrust washers.

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$172.99

USA Standard Gear standard spider gear set for AMC Model 35 with 1.560″ side gear bore. (used in ’94 and newer models).

Product Features:

Fits AMC Model 35 with open differential and 1.560″ side gear bore
Includes two side gears, two pinion gears, cross pin shaft, cross pin bolt and spider gear thrust washers.

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$2.79

Product Features:

CRUSH SLEEVE 7.25 & 8.25 MIN ORDER 5000

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$2.99

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

Product Features:

Meets or exceeds OE specifications

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$10.99

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

Product Features:

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

Popular 1978 AMC AMX Differentials Categories

Differential Oil

Differential Open Unit and Components

Differential Bearings

Differential Bearing Kits

Front Differential Pinion Bearings

Differential Carrier Shim Kits

Differential Pinion Seals

Differential Ring and Pinions

Differential Lock Assemblies

Front Differential Cover Gaskets

Rear Housing Cover Gaskets

Differential Ring Gear Bolts

Bearing Race Drivers

Differential Crush Sleeves

Differential Pinion Shims

Differential Pinion Shaft Nuts

Differential Gear Install Kits

Differential Pinion Bearing Spacers

Most Popular Differential Bearings for 1978 AMC AMXes

Enhance your 1978 AMC AMX with one of the 5 Differential Bearings we have in stock, starting at just $10.99.

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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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$34.49

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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$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

Best-Selling 1978 AMC AMX Differential Pinion Seal

Upgrade your AMX with our best-selling Differential Pinion Seal.

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$17.49

Top-Quality Differential Oil for 1978 AMC AMXes

Choose a high-quality OEM or aftermarket Differential Oil for AMC AMXes 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

Our Top Pick for a 1978 AMC AMX Rear Housing Cover Gasket

Invest in a durable Rear Housing Cover Gasket for your 1978 AMC, knowing you’re getting trusted brands and expert craftsmanship.

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$8.29

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

Our Differential Ring Gear Bolts for 1978 AMC AMXes

Make a smart move for your 1978 AMC AMX with our Differential Ring Gear Bolt for $1.99.

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$1.99

Product Features:

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

Top-Rated Differential Brands For Your 1978 AMC AMX

When it comes to finding the perfect Differential for your 1978 AMC AMX, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 9 trusted brands. We carry the most popular Differential brands including Valvoline, National, and Driveworks, and more, all known for their exceptional customer ratings (average brand rating of 4.8 stars) and competitive prices, as low as $10.99. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1978 AMC AMX, providing peace of mind with parts that meet or exceed OEM standards.

Popular Valvoline 1978 AMC AMX Differentials

If you’re looking for a top-quality Differential for your 1978 AMC AMX, 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 1978 AMC AMX 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 1978 AMC AMX Differentials

For those in search of a high-quality Differential for their 1978 AMC AMX, 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 $16.99

(25)

Multi-Purpose Bearing

“Smooth”

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 $11.99

(2)

Bearing Race

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

FAQs for 1978 AMC AMX Differentials

What are the best-selling Differentials for 1978 AMC AMXes?

Out of 41 Differentials that fit 1978 AMC AMXes, the following parts are the top sellers:

Multi-Purpose Bearing (3275973) – $16.99
3 Qt – 80W90 Conventional Gear Oil With Posi Additive (11645418) – $57.99
3 Qt – Penzoil 80W90 Conventional Gear Oil (11644279) – $44.99

What’s the price range for 1978 AMC AMX Differentials?

The prices of Differentials for the 1978 AMC AMX range from $1.99 up to $1,566.99 for the most premium parts.

What is the average price of a Differential for a 1978 AMC AMX?

The average price for Differentials for the 1978 AMC AMX is $140.20. 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 AMC AMX model years?

Yes, we carry Differentials for 4 model years of AMC AMXes between 1968 and 1980. The following model years are the most popular for Differential purchases: 1980, 1979, 1970, 1969, and 1968.

What are the cheapest Differentials for my 1978 AMC AMX?

The cheapest 1978 AMC AMX Differentials we carry are:

Ring Gear Bolt (19640279) – $1.99
Differential Crush Sleeve (10592883) – $2.99
Differential Pinion Nut (10954713) – $6.99
Axle Housing Cover Gasket Oval Shaped 10 Bolt Hole Gasket (5723485) – $8.29
Bearing Race (3277569) – $9.99

Does Advance Auto Parts sell Differentials for any other 1978 AMC models?

Yes. We stock Differentials for 3 other popular 1978 AMC models. Some of the most popular are 1978 Gremlin Differentials, 1978 Pacer Differentials, 1978 Matador Differentials, and 1978 Concord Differentials.

What types of Differentials do you sell for my 1978 AMC AMX?

As of 3/1/26, these are some of the most in-demand types of Differentials for a 1978 AMC AMX:

Can I get help with 1978 AMC AMX Differential orders?

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

What is your return policy for AMC AMX Differentials?

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

1978 AMC AMX Differentials

Yukon Gear – Model 20 Gasket (Part No.23025)

Motive Gear – Ring Gear Bolt (Part No.D8OZ4216B)

Motive Gear – Differential Bearing Kit – Timken (Part No.R20RT)

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

Motive Gear – Differential Ring and Pinion (Part No.D35-456)

Yukon Gear – Bearing Race Driver (Part No.56020)

Motive Gear – Differential Gear Install Kit (Part No.D35IKJ)

Yukon Gear – Ppinion Nut 7/8-20 Thread, 1 1/8 Socket (Part No.33146)

Yukon Gear – Pinion Seal For Model 20 And Model 35 (Part No.30079)

Motive Gear – Differential Pinion Seal (Part No.470331N)

Felpro – Axle Housing Cover Gasket Oval Shaped 10 Bolt Hole Gasket (Part No.RDS 13089)

Motive Gear – Differential Pinion Solid Spacer Kit w/Shims (Part No.4104)

Motive Gear – Differential Pinion Solid Spacer Kit w/Shims (Part No.4105)

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

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

Powertrax – Grip PRO Traction System (Part No.GT443527)

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

Yukon Gear – Set Up Bearing (Part No.56045)

Motive Gear – Differential Pinion Shim Kit (Part No.1112)

Yukon Gear – Pinion Depth Shims For GM 8.25" IFS, 8.5", 12 Bolt Car, Ford 8.8" & Chrysler 8.25" (Part No.55009)

Yukon Gear – 20 Long Air Line For Zip Locker (Part No.34002)

Yukon Gear – Zip Locker Bulkhead Fitting (Part No.34001)

Yukon Gear – Standard Open Spider Gear Kit For Model 35 With 27 Spline Axles – Hubs Have 1.625" Diameter (Part No.16129)

Yukon Gear – Positraction Internals For Model 35 With 27 Spline Axles (Part No.16130)

USA Standard Gear – Standard Spider Gear Set For Amc Model 35 With 1.560" Side Gear Bore (Part No.39030)

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

Pro-King – Differential Crush Sleeve (Part No.721A034)

Yukon Gear – Crush Sleeve (Part No.33093)

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)

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

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

Motive Gear – Differential Pinion Seal (Part No.470331N)

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)

Felpro – Axle Housing Cover Gasket Oval Shaped 10 Bolt Hole Gasket (Part No.RDS 13089)

Motive Gear – Ring Gear Bolt (Part No.D8OZ4216B)