1978 Cadillac Eldorado Differentials
Keep Your 1978 Cadillac Eldorado 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 Eldorado looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Differential Oil, Rear Differential Cover Gaskets, and Differential Pinion Shaft Lock Bolts. 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 Valvoline and Dorman. For example, Valvoline Differentials start at just $35.99 with an average 4.8 star rating. Dorman offer similar pricing and quality, backed by strong customer feedback. With over 914 reviews and a solid 5 star average, you can shop with confidence knowing other Cadillac Eldorado owners approve.
Competitive Prices and Extensive Inventory
The average price for a 1978 Cadillac Eldorado Differential at Advance Auto Parts is around $18.64, with a range that starts at $6.79 and goes up to $35.99. With 6 options in stock from 6 trusted brands, finding the right fit is easy. Popular picks like Differential Shaft Lock Bolt, Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, and Bearing Race 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 CV Axles and Joints and Drive Shafts and Axles. At Advance Auto Parts, we’re here to help you keep your 1978 Cadillac Eldorado in peak condition, inside and out.
Find Your Specific 1978 Cadillac Eldorado Differentials
Looking for the perfect Differential for your 1978 Cadillac Eldorado? 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 Eldorado. Whether you’re driving a 1978 model or another popular model year like
1994,
1995,
1996,
1997,
1998,
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 1978 Cadillac Eldorado Differentials
Castrol – Transmax ATF/CVT Universal Transmission Fluid, Smooth Performance, 1 Gallon (Part No.15E0C8)
from
$28.99
Castrol® Transmax® ATF/CVT Universal is a premium full-synthetic transmission fluid engineered for exceptional performance in both traditional step-shifting automatic transmissions and modern continuously variable transmissions (CVTs). Featuring Castrol Smooth Drive® Technology, it ensures enhanced friction durability for seamless gear shifts and superior high-temperature protection to resist oxidation. This advanced formulation offers unmatched protection against copper corrosion, extending the life of your transmission system. Its broad compatibility covers a wide range of ATF and CVT applications, including Dexron VI, Mercon LV, Toyota WS, Honda DW-1, Nissan Matic S, and many more, making it ideal for diverse vehicle types, including hybrids. Designed to improve workshop efficiency and simplify inventory management, this fluid is a versatile solution for professional mechanics and DIY enthusiasts alike. Packaged in a convenient 1-gallon size, it delivers outstanding value and reliability for maintaining optimal transmission performance.
Product Features:
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Product Features:
- Enhanced friction durability for smooth transmission performance
- Superior high temperature protection to effectively resist oxidation
- Unsurpassed protection against copper corrosion
- Broad scope of vehicle applications improves workshop efficiency and inventory management
- ATF Applications: Dexron VI (Dexron III, Dexron), Mercon LV (Mercon SP, Mercon V, Mercon), JASO 1A (03), JASO 1A LV (13), Toyota T IV, Toyota T III, Toyota WS, Honda/Acura DW 1/Z 1, Nissan Matic D, Matic J, Matic S, Hyundai/Kia SP IV, SP III
- ATF Applications: Mazda ATF M-V, M-III, FZ, Mitsubishi SP IV, SP III, IIM, II, PA, J3, VW/Audi (6, 8 & 9 speed automatics), BMW/Mini (6, 8 and 9 speed automatics), Jaguar/Land Rover (6, 8 & 9 speed automatics), Porsche (6, 8 & 9 speed automatics)
- ATF Applications: Volvo (6, 8 and 9 speed automatics), Volvo Transmission Oil 97342, AT102, Mercedes-Benz (7 and 9 speed automatics)
- CVT Applications: Toyota CVT Fluid TC, Toyota CVT Fluid FE , Nissan CVT Fluid NS-1, Nissan CVT Fluid NS-2, Nissan CVT Fluid NS-3, Subaru i-CVT Fluid, Subaru i-CVT FG, Subaru Lineartronic High Torque Chain CVTF, Honda HCF-2
Valvoline – MaxLife Multi-Vehicle Automatic Transmission Fluid, 1 Gallon (Part No.773775)
from
$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:
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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
National – Bearing Race (Part No.382)
from
$25.49
Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.
Product Features:
See More
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
Schaeffler – Bearing – TRB (Tapered Roller Bearing) (Part No.KT5)
from
$21.29
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:
See More
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
Driveworks – Taper Bearing Cone (Part No.S-LM-501349)
from
$10.99
Value-priced bearing meets all cataloged application requirements.
Product Features:
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Product Features:
- Brand may vary by location
Felpro – Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket (Part No.RDS 55034)
from
$14.29
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:
See More
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
National – Tapered Roller Bearing Cone (Part No.M804049)
from
$34.99
Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.
Product Features:
See More
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
Driveworks – Tapered Roller Bearing (Part No.S-LM-603012)
Driveworks – Tapered Roller Bearing (Part No.S-HM-803110)
National – Tapered Roller Bearing Cone (Part No.HM804846)
from
$43.99
Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.
Product Features:
See More
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
National – Bearing Race (Part No.LM501314)
from
$11.99
Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.
Product Features:
See More
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
National – Bearing Race (Part No.HM803110)
from
$19.99
Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.
Product Features:
See More
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
Dorman – Help – Differential Shaft Lock Bolt (Part No.81048)
from
$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:
See More
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
Popular 1978 Cadillac Eldorado Differentials Categories
Most Popular Differential Oil for 1978 Cadillac Eldorados
Enhance your 1978 Cadillac Eldorado with this popular Differential Oil we have in stock, for $35.99.
Valvoline – MaxLife Multi-Vehicle Automatic Transmission Fluid, 1 Gallon (Part No.773775)
from
$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:
See More
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
Best-Selling 1978 Cadillac Eldorado Rear Differential Cover Gasket
Upgrade your Eldorado with our best-selling Rear Differential Cover Gasket.
Felpro – Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket (Part No.RDS 55034)
from
$14.29
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:
See More
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
Top-Quality Differential Pinion Shaft Lock Bolts for 1978 Cadillac Eldorados
Choose a high-quality OEM or aftermarket Differential Pinion Shaft Lock Bolt for Cadillac Eldorados and enjoy top-notch performance from $6.79.
Dorman – Help – Differential Shaft Lock Bolt (Part No.81048)
from
$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:
See More
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
Our Top Pick for a 1978 Cadillac Eldorado Front Differential Pinion Bearing
Invest in a
durable Front Differential Pinion Bearing for your 1978 Cadillac, knowing you’re getting trusted brands and expert craftsmanship.
Driveworks – Tapered Roller Bearing (Part No.S-LM-603012)
Differential Bearings for 1978 Cadillac Eldorados
Make a smart move for your 1978 Cadillac Eldorado with products all priced from $21.29 to $25.49.
National – Bearing Race (Part No.382)
from
$25.49
Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.
Product Features:
See More
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
Schaeffler – Bearing – TRB (Tapered Roller Bearing) (Part No.KT5)
from
$21.29
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:
See More
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
Top-Rated Differential Brands For Your 1978 Cadillac Eldorado
When it comes to finding the perfect Differential for your 1978 Cadillac Eldorado, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 6 trusted brands. We carry the most popular Differential brands including Valvoline and Dorman, and more, all known for their exceptional customer ratings (average brand rating of 4.8 stars) and competitive prices, as low as $6.79. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1978 Cadillac Eldorado, providing peace of mind with parts that meet or exceed OEM standards.
Popular Valvoline 1978 Cadillac Eldorado Differentials
If you’re looking for a top-quality Differential for your 1978 Cadillac Eldorado, 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 Eldorado 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 Dorman 1978 Cadillac Eldorado Differentials
For those in search of a high-quality Differential for their 1978 Cadillac Eldorado, Advance Auto Parts offers a great selection of Dorman Differentials. With 1 Dorman 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 $6.79, giving you a range of options to suit your budget. Backed by over 11 customer ratings and an average rating of 4.2 stars, Dorman Differentials provide both reliability and excellent performance. Choosing a Dorman Differential from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
FAQs for 1978 Cadillac Eldorado Differentials
What are the best-selling Differentials for 1978 Cadillac Eldorados?
Out of 6 Differentials that fit 1978 Cadillac Eldorados, the following parts are the top sellers:
- Differential Shaft Lock Bolt (5707714) – $6.79
- Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket (19780701) – $14.29
- Bearing Race (18440574) – $25.49
What’s the price range for 1978 Cadillac Eldorado Differentials?
The prices of Differentials for the 1978 Cadillac Eldorado range from $6.79 up to $35.99 for the most premium parts.
What is the average price of a Differential for a 1978 Cadillac Eldorado?
The average price for Differentials for the 1978 Cadillac Eldorado is $18.64. 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 Eldorado model years?
What are the cheapest Differentials for my 1978 Cadillac Eldorado?
The cheapest 1978 Cadillac Eldorado Differentials we carry are:
- Differential Shaft Lock Bolt (5707714) – $6.79
- Tapered Roller Bearing (10659441) – $7.99
- Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket (19780701) – $14.29
- Bearing – TRB (Tapered Roller Bearing) (50206196) – $21.29
- Bearing Race (18440574) – $25.49
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 Seville Differentials, 1978 Fleetwood Differentials, and 1978 Commercial Chassis Differentials.
What are the top-rated Differentials that fit the 1978 Cadillac Eldorado?
The one 1978 Cadillac Eldorado Differential we have in stock is the Differential Shaft Lock Bolt. It is rated 4 stars and costs $6.79.
What types of Differentials do you sell for my 1978 Cadillac Eldorado?
As of 3/1/26, these are some of the most in-demand types of Differentials for a 1978 Cadillac Eldorado:
Can I get help with 1978 Cadillac Eldorado 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 Eldorado Differentials?
Advance Auto Parts keeps returns simple. For new Cadillac Eldorado Differentials and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.