1978 Cadillac Seville Differentials

Name: Differential Rebuild Kit
Brand: Pro-King
SKU: 742G004
Price: 81.99 USD

Please Select your Vehicle to See Exact Fit Parts

Keep Your 1978 Cadillac Seville in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1978 Cadillac Seville looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Differential Pinion Seals, Differential Covers, and Differential Bearings. 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, Motive Gear, and Valvoline. For example, National Differentials start at just $16.99 with an average 4.3 star rating. Motive Gear and Valvoline offer similar pricing and quality, backed by strong customer feedback. With over 1,008 reviews and a solid 5 star average, you can shop with confidence knowing other Cadillac Seville owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1978 Cadillac Seville Differential at Advance Auto Parts is around $147.68, with a range that starts at $2.99 and goes up to $1,566.99. With 46 options in stock from 11 trusted brands, finding the right fit is easy. Popular picks like Multi-Purpose Bearing, 3 Qt – 80W90 Conventional Gear Oil With Posi Additive, and Differential Shaft Lock Bolt start at just $6.79 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 Cadillac Seville in peak condition, inside and out.

Looking for the perfect Differential for your 1978 Cadillac Seville? 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 Cadillac Seville. Whether you’re driving a 1978 model or another popular model year like 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, and 2004, 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 Cadillac Seville Differentials

from

$81.99

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

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$43.99

National has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.

Product Features:

Designed to repair damaged, grooved or worn shafts
Durable stainless steel construction for corrosion-free sealing surface that surpasses most original shaft specifications
Ideal for a shaft where indications of seal wear, such as tracks or grooves have developed
Ultra-thin construction (0.01/0.25mm wall thickness) allows original seal size to be used with minimal additional lip loading
Easy to install with removable flange and installation tool

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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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$2.99

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

Product Features:

Meets or exceeds OE specifications

from

$99.99

Redline Synthetic “Shock Proof” Oil. 3 Quarts.

Product Features:

Includes three quarts of Redline Shockproof oil

from

$19.99

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

Value-priced bearing meets all cataloged application requirements.

Product Features:

Brand may vary by location

from

$21.99

Pro-King High Quality Differential Products are designed for trouble free installation and setup.

Product Features:

Meets or exceeds OE specifications

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$8.49

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
Unsurpassed quality you can trust
Validated for fit, form and function
Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes

from

$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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$7.99

High-quality Differential Component Shim

Product Features:

SHIM KIT FITS-8.25-F7.5-AMC20-GM0

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$98.99

Product Features:

MINI SPOOL GM 10 BOLT 8 1/2″ 28 SPLINE

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$551.99

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!The Powertrax® Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Powertrax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.

Powertrax® lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.

Powertrax® 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.

Powertrax® = Extreme Traction Systems!

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$1566.99

21 Piece bearing race driver set. (Box wt: 140lbs) No return.

Product Features:

Bearing race driver set
21 pieces
All steel construction

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$258.99

Product Features:

GM 10BL 8.5 R/P 4.30

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$407.99

RngPnn

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$6.99

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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$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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$7.99

Product Features:

Brand may vary by location

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$111.99

Product Features:

GM10 BOLT 8.5″ 28 SPL INTERNAL KIT (OPEN)

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$14.29

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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$10.79

Value-priced seal meets all cataloged application requirements.

Product Features:

Brand may vary by location

from

$17.99

Design type: spring loaded; multi-lip
Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
Good low temperature capability
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

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$66.99

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.

Popular 1978 Cadillac Seville Differentials Categories

Differential Oil

Rear Differential Cover Gaskets

Differential Covers

Differential Pinion Shaft Lock Bolts

Differential Bearings

Differential Pinion Pilot Bearings

Differential Bearing Kits

Front Differential Pinion Bearings

Differential Rebuild Kits

Differential Carrier Shim Kits

Differential Pinion Seals

Differential Cover Plugs

Differential Mini Spools

Differential Ring and Pinions

Differential Lock Assemblies

Differential Ring Gear Bolts

Bearing Race Drivers

Differential Pinion Shafts

Differential Crush Sleeves

Differential Pinion Shims

Most Popular Differential Pinion Seals for 1978 Cadillac Sevilles

Enhance your 1978 Cadillac Seville with one of the 3 Differential Pinion Seals we have in stock, starting at just $10.79.

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from

$10.79

Value-priced seal meets all cataloged application requirements.

Product Features:

Brand may vary by location

from

$17.99

Design type: spring loaded; multi-lip
Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
Good low temperature capability
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

from

$14.29

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 Cadillac Seville Differential Cover

Upgrade your Seville with our best-selling Differential Cover.

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from

$21.99

Pro-King High Quality Differential Products are designed for trouble free installation and setup.

Product Features:

Meets or exceeds OE specifications

Top-Quality Differential Bearings for 1978 Cadillac Sevilles

Choose a high-quality OEM or aftermarket Differential Bearing for Cadillac Sevilles and enjoy top-notch performance from $16.99.

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from

$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

from

$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

Top Picks for 1978 Cadillac Seville Differential Oil

Invest in one of our 6 durable Differential Oil for your 1978 Cadillac, knowing you’re getting trusted brands and expert craftsmanship.

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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-Rated Rear Differential Cover Gaskets for 1978 Cadillac Sevilles

Make a smart move for your 1978 Cadillac Seville with our Rear Differential Cover Gasket for $8.49.

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from

$8.49

Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
Unsurpassed quality you can trust
Validated for fit, form and function
Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes

Top-Rated Differential Brands For Your 1978 Cadillac Seville

When it comes to finding the perfect Differential for your 1978 Cadillac Seville, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 11 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 1978 Cadillac Seville, providing peace of mind with parts that meet or exceed OEM standards.

Popular Valvoline 1978 Cadillac Seville Differentials

If you’re looking for a top-quality Differential for your 1978 Cadillac Seville, 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 Cadillac Seville 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 Cadillac Seville Differentials

For those in search of a high-quality Differential for their 1978 Cadillac Seville, 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 $16.99, with an average price of $26.32, giving you a range of options to suit your budget. Backed by over 32 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

(5)

Differential Pinion Seal

“Perfect fit”

from $43.99

(2)

Shaft Repair Sleeve

“As a mechanic I dont have time or money to waste on inferior products, which this is not. Great product,great price”

FAQs for 1978 Cadillac Seville Differentials

What are the best-selling Differentials for 1978 Cadillac Sevilles?

Out of 46 Differentials that fit 1978 Cadillac Sevilles, 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
Differential Shaft Lock Bolt (5707714) – $6.79

What’s the price range for 1978 Cadillac Seville Differentials?

The prices of Differentials for the 1978 Cadillac Seville range from $2.99 up to $1,566.99 for the most premium parts.

What is the average price of a Differential for a 1978 Cadillac Seville?

The average price for Differentials for the 1978 Cadillac Seville is $147.68. 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 Cadillac Seville model years?

Yes, we carry Differentials for 27 model years of Cadillac Sevilles between 1976 and 2004. The following model years are the most popular for Differential purchases: 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, and 1996.

What are the cheapest Differentials for my 1978 Cadillac Seville?

The cheapest 1978 Cadillac Seville Differentials we carry are:

Ring Gear Bolt (20520168) – $2.99
Differential Crush Sleeve (10282146) – $2.99
Differential Ring Gear Bolt (10282159) – $2.99
Differential Cross Shaft (10282201) – $2.99
Crush Sleeve (10715253) – $4.99

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

Yes. We stock Differentials for 3 other popular 1978 Cadillac models. Some of the most popular are 1978 DeVille Differentials, 1978 Eldorado Differentials, 1978 Fleetwood Differentials, and 1978 Commercial Chassis Differentials.

What are the top-rated Differentials that fit the 1978 Cadillac Seville?

The one 1978 Cadillac Seville Differential we have in stock is the Ring Gear Bolt. It costs $2.99.

What types of Differentials do you sell for my 1978 Cadillac Seville?

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

Can I get help with 1978 Cadillac Seville Differential orders?

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

What is your return policy for Cadillac Seville Differentials?

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

1978 Cadillac Seville Differentials

Pro-King – Differential Rebuild Kit (Part No.742G004)

National – Shaft Repair Sleeve (Part No.99193)

Pro-King – Differential Cross Shaft (Part No.742G930)

Pro-King – Differential Crush Sleeve (Part No.742G034)

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

Pro-King – Differential Carrier Shim Kit (Part No.741A200)

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

Pro-King – Differential Carrier Cover (Part No.742G758A)

Felpro – Axle Housing Cover Gasket Oval Shaped 12 Bolt Hole Gasket (Part No.RDS 55029)

Pro-King – Differential Ring Gear Bolt (Part No.742G935)

Motive Gear – Differential Pinion Shim Kit (Part No.1100)

Motive Gear – Differential Mini Spool (Part No.MS10-28)

Powertrax – No-Slip Traction System (Part No.9207883005)

Yukon Gear – Bearing Race Driver Set, 21 Piece (Part No.56030)

Motive Gear – Differential Ring and Pinion (Part No.GM10-430)

Richmond Gear – RngPnn (Part No.69-0173-1)

Pro-King – Differential Cover Plug (Part No.742G484)

National – Bearing Race (Part No.LM501314)

Driveworks – Tapered Roller Bearing (Part No.S-LM-603012)

Motive Gear – Differential Carrier Gear Kit (Part No.GM10BI)

Schaeffler – Shaft Seal (Part No.SS2983)

Driveworks – Oil Seal (Part No.S-2043)

National – Differential Pinion Seal (Part No.2043)

Richmond Gear – Differential Cross Shaft (Part No.80-0272-1)

Driveworks – Oil Seal (Part No.S-2043)

National – Differential Pinion Seal (Part No.2043)

Schaeffler – Shaft Seal (Part No.SS2983)

Pro-King – Differential Carrier Cover (Part No.742G758A)

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

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

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 12 Bolt Hole Gasket (Part No.RDS 55029)