1978 Mazda Cosmo Differentials
Keep Your 1978 Mazda Cosmo in Top Shape with Quality Differentials
Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1978 Mazda Cosmo looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Differential Pinion Bearing Kits, Differential Bearings, and Front Differential Pinion 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 Driveworks. For example, Driveworks Differentials start at just $11.99 with an average 4.2 star rating. With over 38 reviews and a solid 4.5 star average, you can shop with confidence knowing other Mazda Cosmo owners approve.
Competitive Prices and Extensive Inventory
The average price for a 1978 Mazda Cosmo Differential at Advance Auto Parts is around $24.80, with a range that starts at $11.99 and goes up to $40.49. With 9 options in stock from 3 trusted brands, finding the right fit is easy. Popular picks like National Tapered Roller Bearing Cone, HM803146, National Bearing Race, HM803110, and National Shaft Repair Sleeve, 99166 start at just $20.79 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 Transfer Cases. At Advance Auto Parts, we’re here to help you keep your 1978 Mazda Cosmo in peak condition, inside and out.
Find Your Specific 1978 Mazda Cosmo Differentials
Looking for the perfect Differential for your 1978 Mazda Cosmo? 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 Mazda Cosmo. Whether you’re driving a 1978 model or another popular model year like
1976 and
1977, 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 Mazda Cosmo Differentials
Driveworks – Driveworks Tapered Roller Bearing, S-32207 (Part No.S-32207)
National – National Multi-Purpose Bearing, 32206 (Part No.32206)
from
$30.99
Manufactured with premium materials, National taper bearing assemblies are designed and engineered to meet OE specifications.
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National – National Tapered Roller Bearing Cone, HM803146 (Part No.HM803146)
from
$40.49
Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.
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National – National Bearing Race, HM803110 (Part No.HM803110)
from
$20.79
Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.
See More
National – National Shaft Repair Sleeve, 99166 (Part No.99166)
from
$36.49
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.
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Driveworks – Driveworks Taper Bearing Set, S-A-6 (Part No.S-A-6)
Valvoline – Valvoline Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid 1 GA, 904891 (Part No.904891)
from
$35.99
Choosing an automatic transmission fluid just got easier. Valvoline Full Synthetic MaxLife Multi-Vehicle ATF, the #1 ATF product, is suitable for use in 95% of ATF vehicles in operation with US registered light duty applications. And now, it€™s also recommended for most belt and chain-driven continuously variable transmissions (CVT). Featuring advanced additives to prevent the major causes of transmission breakdown, it€™s designed to help prevent leaks, reduce wear and tear, and maximize performance €“ all for much longer than conventional fluids. It has improved thermal stability for longer fluid life, better viscosity stability for consistent transmission operation, and frictional enhancements for smooth gear engagements. Whether your vehicle has a CVT or traditional automatic, Valvoline MaxLife Multi-Vehicle ATF is suitable for a broad range of transmissions including Ford, GM, Toyota, Honda, Nissan, Hyundai, Subaru, BMW, Mercedes, Volvo, VW and Audi vehicles. It€™s specifically recommended for use in the following applications: GM DEXRON-II, DEXRON-III, DEXRON-VI, and DEX-CVT; Ford MERCON LV; Toyota/Lexus Type T, T-II, T-IV, WS, CVTF FE, and CVTF TC. For the many miles ahead, trust your transmission with Valvoline, the #1 automatic transmission fluid brand.
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Driveworks – Driveworks Tapered Roller Bearing, S-HM-803110 (Part No.S-HM-803110)
Driveworks – Driveworks Wheel Bearing, S-RW-128-R (Part No.S-RW-128-R)
Popular 1978 Mazda Cosmo Differentials Categories
Most Popular Differential Pinion Bearing Kit for 1978 Mazda Cosmos
Enhance your 1978 Mazda Cosmo with this popular Differential Pinion Bearing Kit we have in stock, for $11.99.
Driveworks – Driveworks Taper Bearing Set, S-A-6 (Part No.S-A-6)
Best-Selling 1978 Mazda Cosmo Differential Bearings
Upgrade your Cosmo with one of our 2 best-selling Differential Bearings.
Top-Quality Front Differential Pinion Bearings for 1978 Mazda Cosmos
Choose a high-quality OEM or aftermarket Front Differential Pinion Bearing for Mazda Cosmos and enjoy top-notch performance from $20.79.
National – National Tapered Roller Bearing Cone, HM803146 (Part No.HM803146)
from
$40.49
Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.
See More
National – National Bearing Race, HM803110 (Part No.HM803110)
from
$20.79
Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.
See More
National – National Multi-Purpose Bearing, 32206 (Part No.32206)
from
$30.99
Manufactured with premium materials, National taper bearing assemblies are designed and engineered to meet OE specifications.
See More
Driveworks – Driveworks Tapered Roller Bearing, S-32207 (Part No.S-32207)
Our Top Pick for a 1978 Mazda Cosmo Differential Oil
Invest in a
durable Differential Oil for your 1978 Mazda, knowing you’re getting trusted brands and expert craftsmanship.
Valvoline – Valvoline Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid 1 GA, 904891 (Part No.904891)
from
$35.99
Choosing an automatic transmission fluid just got easier. Valvoline Full Synthetic MaxLife Multi-Vehicle ATF, the #1 ATF product, is suitable for use in 95% of ATF vehicles in operation with US registered light duty applications. And now, it€™s also recommended for most belt and chain-driven continuously variable transmissions (CVT). Featuring advanced additives to prevent the major causes of transmission breakdown, it€™s designed to help prevent leaks, reduce wear and tear, and maximize performance €“ all for much longer than conventional fluids. It has improved thermal stability for longer fluid life, better viscosity stability for consistent transmission operation, and frictional enhancements for smooth gear engagements. Whether your vehicle has a CVT or traditional automatic, Valvoline MaxLife Multi-Vehicle ATF is suitable for a broad range of transmissions including Ford, GM, Toyota, Honda, Nissan, Hyundai, Subaru, BMW, Mercedes, Volvo, VW and Audi vehicles. It€™s specifically recommended for use in the following applications: GM DEXRON-II, DEXRON-III, DEXRON-VI, and DEX-CVT; Ford MERCON LV; Toyota/Lexus Type T, T-II, T-IV, WS, CVTF FE, and CVTF TC. For the many miles ahead, trust your transmission with Valvoline, the #1 automatic transmission fluid brand.
See More
Our Differential Pinion Pilot Bearings for 1978 Mazda Cosmos
Make a smart move for your 1978 Mazda Cosmo with our Differential Pinion Pilot Bearing for $36.49.
National – National Shaft Repair Sleeve, 99166 (Part No.99166)
from
$36.49
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.
See More
Top-Rated Differential Brands For Your 1978 Mazda Cosmo
When it comes to finding the perfect Differential for your 1978 Mazda Cosmo, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 3 trusted brands. We carry the most popular Differential brands including Driveworks, and more, all known for their exceptional customer ratings (average brand rating of 4.2 stars) and competitive prices, as low as $11.99. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1978 Mazda Cosmo, providing peace of mind with parts that meet or exceed OEM standards.
Popular Driveworks 1978 Mazda Cosmo Differentials
If you’re looking for a top-quality Differential for your 1978 Mazda Cosmo, Advance Auto Parts has exactly what you need with our selection of Driveworks Differentials. We have 1 Driveworks Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $11.99, you’ll find the perfect Differential for your needs and budget. Driveworks Differentials for the 1978 Mazda Cosmo come highly rated, with over 38 customer reviews and an impressive average rating of 4.2 stars. Choosing a Driveworks Differential from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
FAQs for 1978 Mazda Cosmo Differentials
What are the best-selling Differentials for 1978 Mazda Cosmos?
Out of 9 Differentials that fit 1978 Mazda Cosmos, the following parts are the top sellers:
- National Tapered Roller Bearing Cone, HM803146 (3276902) – $40.49
- National Bearing Race, HM803110 (3276899) – $20.79
- National Shaft Repair Sleeve, 99166 (18445101) – $36.49
What’s the price range for 1978 Mazda Cosmo Differentials?
The prices of Differentials for the 1978 Mazda Cosmo range from $11.99 up to $40.49 for the most premium parts.
What is the average price of a Differential for a 1978 Mazda Cosmo?
The average price for Differentials for the 1978 Mazda Cosmo is $24.80. 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.
What are the cheapest Differentials for my 1978 Mazda Cosmo?
The cheapest 1978 Mazda Cosmo Differentials we carry are:
- Driveworks Taper Bearing Set, S-A-6 (5050537) – $11.99
- Driveworks Wheel Bearing, S-RW-128-R (11339821) – $11.99
- Driveworks Tapered Roller Bearing, S-HM-803110 (10659680) – $13.49
- National Bearing Race, HM803110 (3276899) – $20.79
- Driveworks Tapered Roller Bearing, S-32207 (11494039) – $20.99
Does Advance Auto Parts sell Differentials for any other 1978 Mazda models?
Yes. We stock Differentials for 3 other popular 1978 Mazda models. Some of the most popular are 1978 GLC Differentials, 1978 RX-3 Differentials, 1978 RX-4 Differentials, and 1978 B1800 Differentials.
What are the top-rated Differentials that fit the 1978 Mazda Cosmo?
The one 1978 Mazda Cosmo Differential we have in stock is the Driveworks Taper Bearing Set, S-A-6. It is rated 4.5 stars and costs $11.99.
What types of Differentials do you sell for my 1978 Mazda Cosmo?
As of 8/2/26, these are some of the most in-demand types of Differentials for a 1978 Mazda Cosmo:
Can I get help with 1978 Mazda Cosmo Differential orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Mazda Differentials and more.
What is your return policy for Mazda Cosmo Differentials?
Advance Auto Parts keeps returns simple. For new Mazda Cosmo Differentials and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.