1978 Mazda Cosmo Transmission Parts
Find Your Specific 1978 Mazda Cosmo Transmission Parts
Below you will find various in-demand Mazda Transmission Parts, components and accessories for your 1978 Cosmo. Advance Auto Parts has popular Cosmo parts like Transmission Cooler and Parts, Transmission Seals, Automatic Transmission Pan and Gaskets and more. You’ll also find aftermarket and OEM Transmission Parts for other Cosmo model years including
1976
1977 and more. Select a category of 1978 Mazda Cosmo Transmission Parts below and start saving instantly.
Popular 1978 Mazda Cosmo Transmission Parts Categories
Essential Transmission Parts for 1978 Mazda Cosmos
National – National Ball Bearing, 305 (Part No.305)
from
$41.49
Designed to meet or exceed OE quality, premium-quality bearings from National® are manufactured to exacting standards to deliver lasting performance and extended bearing life.
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Imperial – Imperial High Performance Transmission Oil Cooler, 240512 (Part No.240512)
from
$68.99
Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.
See More
Imperial – Imperial High Performance Transmission Oil Cooler, 240514 (Part No.240514)
from
$81.99
Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.
See More
National – National Multi-Purpose Seal, 2025 (Part No.2025)
from
$17.29
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
Schaeffler – Schaeffler Cup, LM67010 (Part No.LM67010)
from
$5.99
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.
See More
National – National Multi-Purpose Bearing, A-6 (Part No.A-6)
from
$17.29
Manufactured with premium-grade steel, National® taper bearing sets feature crowned raceways and rollers to ensure even load distribution.
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Imperial – Imperial Econo-Kool Transmission Oil Cooler, 242012 (Part No.242012)
from
$54.99
Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.
See More
Imperial – "Imperial Plate and Fin Style Transmission Cooler, Heavy Duty, 3/4"" x 9-1/2"" x 11"", 243008" (Part No.243008)
from
$91.99
The Imperial Maxi-Cool XL’s plate and fin design offer excellent cooling efficiency in a compact, space-efficient design.
See More
Imperial – "Imperial Plate and Fin Style Transmission Cooler, Light Duty, 3/4"" x 5-7/8"" x 11"", 243006" (Part No.243006)
from
$60.99
The Imperial Maxi-Cool XL’s plate and fin design offer excellent cooling efficiency in a compact, space-efficient design.
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Carquest Premium – Carquest Back Up Light Switch, SBA3534 (Part No.SBA3534)
from
$23.99
The main device in any electrical circuit is a switch. In an electrical circuit a device is required to turn a component on or off when commanded by the operator, within the switch are contacts that will complete the electrical path to the load, or driven device. The operation of a switch may be manual from a person or could be electrical from some sort of controller or computer.
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Imperial – Imperial Mounting Kit System, 226201 (Part No.226201)
from
$11.99
Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.
See More
Imperial – Imperial Transmission Oil Cooler Reinstallation Kit, 248002 (Part No.248002)
from
$21.99
Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.
See More
National – National Bearing, LM67048 (Part No.LM67048)
from
$7.39
Manufactured with premium-grade steel, National® taper bearing cones feature crowned raceways and rollers to ensure even load distribution.
See More
National – National Multi-Purpose Bearing, 32008 (Part No.32008)
from
$37.49
Manufactured with premium materials, National taper bearing assemblies are designed and engineered to meet OE specifications.
See More
Carquest Premium – Carquest Automatic Transmission Modulator Valve, VMA1002 (Part No.VMA1002)
from
$53.99
The transmission modulator valve is a vacuum operated mechanical device located on the transmission case. This valve will have a actuator rod extended into the transmission valve body inside the transmission which will control the flow of transmission fluid within the transmission to place the transmission in the most optimal forward gear selection.
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Pro-King – Pro-King Automatic Transmission Vacuum Modulator, MD-30 (Part No.MD-30)
Pro-King – Pro-King Automatic Transmission Vacuum Modulator, MD-29 (Part No.MD-29)
Felpro – Felpro Transmission Oil Pan Gasket 14 Bolt Hole One Piece Gasket, TOS 18644 (Part No.TOS 18644)
from
$7.49
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust.
See More
Upgrade your 1978 Mazda Cosmo with Top-Quality Transmission Parts
When it comes to maintaining or upgrading your 1978 Mazda Cosmo, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your Mazda or enhancing its overall performance, Transmission Parts are key to keeping your Cosmo functioning at its best. At Advance Auto Parts, we offer a wide selection of 22 Transmission Parts for the 1978 Mazda Cosmo, designed to meet your needs without breaking the bank.
From
Transmission Cooler and Part
replacements to
Transmission Seals
upgrades, we’ve got you covered with parts that fit your vehicle perfectly and ensure long-lasting performance.
Affordable Prices and Wide Selection
Shopping for Transmission Parts for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Transmission Parts for your 1978 Mazda Cosmo at great prices.
Our Transmission Parts inventory for this model
ranges from just $5.99 to $91.99, with
an average price of $40.87.
Our 22 Transmission Parts in stock come from 6 trusted brands, so you’re sure to find the right part for your 1978 Mazda Cosmo without overspending.
Top Brands and High Customer Satisfaction
Advance Auto Parts takes pride in offering only the best brands in the automotive industry. For your 1978 Mazda Cosmo, we stock popular OEM and aftermarket Transmission Parts from top names
like National Imperial, and more.
National Transmission Parts
start at just $17.29 and boast an impressive 4.3 stars average rating from customers.
With 171 customer reviews and counting, our 1978 Mazda Cosmo Transmission Parts have a strong track record of reliability, ensuring you can trust your purchase.
Explore Related Parts and More
While you’re here, don’t forget to check out other essential categories that go hand in hand with Transmission Part upgrades. Explore related part types like Batteries and Chargers, Fluids and Chemicals
and more to make sure your 1978 Mazda Cosmo is always ready to roll. We’re committed to providing you with everything you need to keep your Cosmo in top shape, all in one place.
Start shopping confidently below for your 1978 Mazda Cosmo!
Best-Selling Transmission Cooler and Parts for 1978 Mazda Cosmos
Enhance the driving experience in your Mazda with 11 quality Transmission Cooler and Part components, starting at $11.99.
Imperial – Imperial High Performance Transmission Oil Cooler, 240516 (Part No.240516)
from
$77.99
Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.
See More
Imperial – Imperial Maxi-Kool XL Transmission Oil Cooler, 243007 (Part No.243007)
from
$70.99
The Imperial Maxi-Cool XL’s plate and fin design offer excellent cooling efficiency in a compact, space-efficient design.
See More
Imperial – "Imperial Plate and Fin Style Transmission Cooler, Light Duty, 3/4"" x 5-7/8"" x 11"", 243006" (Part No.243006)
from
$60.99
The Imperial Maxi-Cool XL’s plate and fin design offer excellent cooling efficiency in a compact, space-efficient design.
See More
Imperial – Imperial Mounting Kit System, 226201 (Part No.226201)
from
$11.99
Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.
See More
Imperial – Imperial Econo-Kool Transmission Oil Cooler, 242010 (Part No.242010)
from
$51.99
Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.
See More
Imperial – Imperial Econo-Kool Transmission Oil Cooler, 242009 (Part No.242009)
from
$39.99
Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.
See More
Imperial – "Imperial Plate and Fin Style Transmission Cooler, Heavy Duty, 3/4"" x 9-1/2"" x 11"", 243008" (Part No.243008)
from
$91.99
The Imperial Maxi-Cool XL’s plate and fin design offer excellent cooling efficiency in a compact, space-efficient design.
See More
Imperial – Imperial Econo-Kool Transmission Oil Cooler, 242012 (Part No.242012)
from
$54.99
Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.
See More
Imperial – Imperial High Performance Transmission Oil Cooler, 240514 (Part No.240514)
from
$81.99
Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.
See More
Imperial – Imperial Transmission Oil Cooler Reinstallation Kit, 248002 (Part No.248002)
from
$21.99
Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.
See More
Imperial – Imperial High Performance Transmission Oil Cooler, 240512 (Part No.240512)
from
$68.99
Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.
See More
Most Popular 1978 Mazda Cosmo Transmission Seals
Customize your Mazda with 1 Transmission Seals products
like Automatic Transmission Oil Pump Seals, all
priced under $17.29.
National – National Multi-Purpose Seal, 2025 (Part No.2025)
from
$17.29
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 Picks for 1978 Mazda Cosmo Automatic Transmission Pan and Gaskets
Upgrade Mazda Cosmos with top-quality Automatic Transmission Pan and Gaskets parts, including 1 OEM and aftermarket selections for your 1978 model.
Felpro – Felpro Transmission Oil Pan Gasket 14 Bolt Hole One Piece Gasket, TOS 18644 (Part No.TOS 18644)
from
$7.49
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust.
See More
In-Demand Automatic Transmission Parts for 1978 Mazda Cosmos
Select from 3 premium Automatic Transmission Parts parts for your 1978 Mazda Cosmo, with prices ranging from $24.99 to $53.99.
Pro-King – Pro-King Automatic Transmission Vacuum Modulator, MD-29 (Part No.MD-29)
Carquest Premium – Carquest Automatic Transmission Modulator Valve, VMA1002 (Part No.VMA1002)
from
$53.99
The transmission modulator valve is a vacuum operated mechanical device located on the transmission case. This valve will have a actuator rod extended into the transmission valve body inside the transmission which will control the flow of transmission fluid within the transmission to place the transmission in the most optimal forward gear selection.
See More
Pro-King – Pro-King Automatic Transmission Vacuum Modulator, MD-30 (Part No.MD-30)
Most Sold 1978 Mazda Cosmo Transmission Bearings
Explore our best-selling Mazda parts for the 1978 Cosmo among 4 OEM and aftermarket options starting from $5.99.
National – National Bearing, LM67048 (Part No.LM67048)
from
$7.39
Manufactured with premium-grade steel, National® taper bearing cones feature crowned raceways and rollers to ensure even load distribution.
See More
National – National Multi-Purpose Bearing, 32008 (Part No.32008)
from
$37.49
Manufactured with premium materials, National taper bearing assemblies are designed and engineered to meet OE specifications.
See More
National – National Ball Bearing, 305 (Part No.305)
from
$41.49
Designed to meet or exceed OE quality, premium-quality bearings from National® are manufactured to exacting standards to deliver lasting performance and extended bearing life.
See More
Schaeffler – Schaeffler Cup, LM67010 (Part No.LM67010)
from
$5.99
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.
See More
Top-Rated Transmission Parts Brands For Your 1978 Mazda Cosmo
Shop for the best-rated brands offering Transmission Parts and other products for your 1978 Mazda Cosmos. Below you’ll find some of our best rated Transmission Parts from National and Imperial, and more. Transmission Parts from these brands that fit a 1978 Cosmo start at just $17.29 and are rated as high as 4.3 stars. OEM and aftermarket Transmission Parts don’t get more top quality, durable, and affordable than from the brands below.
Popular National 1978 Mazda Cosmo Transmission Parts
When it comes to maintaining or upgrading your 1978 Mazda Cosmo, using quality Transmission Parts is essential to ensure durability and a perfect fit. National ticks all of those boxes. We offer a wide selection of National Transmission Parts, specifically designed for the 1978 Mazda Cosmo. With over 2 National brand Transmission Parts in stock, you’re sure to find what you need. The prices for these top-notch parts start as low as $17.29. Plus, with over 26 customer reviews and an average rating of 4.3 stars, you can trust that our National Transmission Parts will get the job done right. Choose Advance Auto Parts for reliability, quality, and expert-approved parts that keep your vehicle running strong.
from
$17.29
(1)
National Multi-Purpose Seal, 2025
“It fit my 1998 Camry front crankshaft O-ring exactly. I can’t say how long it will last, but hopefully as long as the last one.”
Popular Imperial 1978 Mazda Cosmo Transmission Parts
Imperial auto parts is one of the highest quality Transmission Part brands in the market. Any 1978 Mazda Cosmo owner should feel confident when installing genuine Imperial parts in their vehicle. To ensure the best fit and performance for your 1978 Cosmo, Advance Auto Parts carries a full inventory of 3 Imperial Transmission Parts. Plus you will be keeping your Mazda in peak condition while saving money because prices on these Imperial Transmission Parts range from $60.99 to $77.99, plus, with more than 14 customer reviews and an impressive 4.1 stars average rating, you can be confident the Fram Transmission Parts below will deliver on both quality and value.
from
$77.99
(4)
Imperial High Performance Transmission Oil Cooler, 240516
“good quality,easy to install.”
from
$60.99
(3)
"Imperial Plate and Fin Style Transmission Cooler, Light Duty, 3/4"" x 5-7/8"" x 11"", 243006"
“Bought these before for my vehicles. Put this one on a Silhouette and by-passed the in-radiator cooler altogether. Haven’t put a thermometer on it t”
from
$70.99
(7)
Imperial Maxi-Kool XL Transmission Oil Cooler, 243007
“I installed it on my 97 Toyota 4Runner and I added transmission filter. Make sure you purchase extra 3/8″ hoses before you install the cooler. Also I ”
FAQs for 1978 Mazda Cosmo Transmission Parts
Which Transmission Parts are best-sellers for 1978 Mazda Cosmos?
Out of 22 Transmission Parts that fit 1978 Mazda Cosmos, the following parts are the top sellers:
- Imperial Econo-Kool Transmission Oil Cooler, 242009 (6014720) – $39.99
- Imperial Transmission Oil Cooler Reinstallation Kit, 248002 (5670023) – $21.99
- Imperial High Performance Transmission Oil Cooler, 240516 (15230020) – $77.99
What’s the price range for 1978 Mazda Cosmo Transmission Parts?
Transmission Part prices for the 1978 Mazda Cosmo start at $5.99 and go up to $91.99 for the most premium parts.
What’s the average price of a Transmission Part for a 1978 Mazda Cosmo?
The average price for Transmission Parts for the 1978 Mazda Cosmo is $40.87. Keep in mind the variety of part types within our Transmission Part category so you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Transmission Parts for other Mazda Cosmo model years?
What are the cheapest Transmission Parts for my 1978 Mazda Cosmo?
The cheapest 1978 Mazda Cosmo Transmission Parts we carry in stock are:
- Schaeffler Cup, LM67010 (50211146) – $5.99
- National Bearing, LM67048 (3277488) – $7.39
- Felpro Transmission Oil Pan Gasket 14 Bolt Hole One Piece Gasket, TOS 18644 (5723744) – $7.49
- Imperial Mounting Kit System, 226201 (6014844) – $11.99
- National Multi-Purpose Bearing, A-6 (3275973) – $17.29
What types of Transmission Parts do you sell for my 1978 Mazda Cosmo?
As of 8/2/26, these are some of the most in-demand types of Transmission Parts for a 1978 Mazda Cosmo:
Can I get help with 1978 Mazda Cosmo Transmission Part orders?
Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about Mazda Transmission Parts and more.
What is your return policy for Mazda Cosmo Transmission Parts?
Advance Auto Parts keeps returns simple. For new Mazda Cosmo Transmission Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.
