1978 Jeep J20 Flywheels
Keep Your 1978 Jeep J20 in Top Shape with Quality Flywheels
Whether you’re repairing or upgrading your Flywheel, using high-quality parts is key to keeping your 1978 Jeep J20 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Flywheel Ring Gears, Flywheel Shims, and Flywheels and Flexplates. 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.
Competitive Prices and Extensive Inventory
The average price for a 1978 Jeep J20 Flywheel at Advance Auto Parts is around $50.68, with a range that starts at $24.49 and goes up to $86.99. With 6 options in stock from 2 trusted brands, finding the right fit is easy. Popular picks like ATP Manual Transmission Flywheel Ring Gear, ZA-509, ATP Automatic Transmission Flex Plate, Z-104, and ATP Automatic Transmission Flex Plate, Z-131 start at just $34.99 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Flywheel, don’t forget to check out other key components like Clutch Bellcranks and Clutch Pilot Bushings. At Advance Auto Parts, we’re here to help you keep your 1978 Jeep J20 in peak condition, inside and out.
Find Your Specific 1978 Jeep J20 Flywheels
Looking for the perfect Flywheel for your 1978 Jeep J20? You’re in the right place. Below, you’ll find links to various types of Flywheels that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Flywheels, ensuring durability and a precise fit for your Jeep J20. Whether you’re driving a 1978 model or another popular model year like
1979,
1980,
1981,
1982,
1983,
1984,
1985,
1986, and
1987, we’ve got you covered. Purchasing Flywheels 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 Flywheels that fit your vehicle.
Essential 1978 Jeep J20 Flywheels
ATP – ATP Flywheel Shim, TS-4 (Part No.TS-4)
from
$24.49
ATP Flywheel Shims install easily restoring machined manual transmission flywheels back to the proper height. On automatic transmissions the shim takes up excessive clearance caused by engine crankshaft endplay or by installing a rebuilt torque converter or rebuilt front pump.
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ATP – ATP Flywheel Shim, TS-3 (Part No.TS-3)
from
$26.49
ATP Flywheel Shims install easily restoring machined manual transmission flywheels back to the proper height. On automatic transmissions the shim takes up excessive clearance caused by engine crankshaft endplay or by installing a rebuilt torque converter or rebuilt front pump.
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ATP – ATP Flywheel Shim, TS-5 (Part No.TS-5)
from
$29.99
ATP Flywheel Shims install easily restoring machined manual transmission flywheels back to the proper height. On automatic transmissions the shim takes up excessive clearance caused by engine crankshaft endplay or by installing a rebuilt torque converter or rebuilt front pump.
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ATP – ATP Automatic Transmission Flex Plate, Z-104 (Part No.Z-104)
from
$67.99
Vehicles with automatic transmissions have a flex plate. The flex plates connects the engine and transmission. Most flex plates are made of a thick piece of sheet metal with bolt holes for the torque converter and teeth for the starter. The job of a flex plate is to allow for expansion of the torque converter as engine RPM increases. The constant expansion and contraction of a flex plate over time can result cracks and/or shearing of the flex plate. A damaged flex plate can create serious (expensive) damage. Broken flex plates can not be repaired, they must be replaced. ATP flex plates are made of high quality steel and contain the correct bolt hole spacing and ring gear teeth just like the original part to ensure long life and durability
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ATP – ATP Automatic Transmission Flex Plate, Z-131 (Part No.Z-131)
from
$86.99
Vehicles with automatic transmissions have a flex plate. The flex plates connect the engine and transmission. Most flex plates are made of a thick piece of sheet metal with bolt holes for the torque converter and teeth for the starter. The job of a flex plate is to allow for expansion of the torque converter as engine RPM increases. The constant expansion and contraction of a flex plate over time can result cracks and/or shearing of the flex plate. A damaged flex plate can create serious and expensive damage. Broken flex plates cannot be repaired, they must be replaced. Pioneer Flex Plates are made of high-quality steel and contain the correct bolt hole spacing and ring gear teeth just like the original part to ensure long life and durability.
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ATP – ATP Automatic Transmission Flex Plate, Z-102 (Part No.Z-102)
from
$72.99
Vehicles with automatic transmissions have a flex plate. The flex plates connect the engine and transmission. Most flex plates are made of a thick piece of sheet metal with bolt holes for the torque converter and teeth for the starter. The job of a flex plate is to allow for expansion of the torque converter as engine RPM increases. The constant expansion and contraction of a flex plate over time can result cracks and/or shearing of the flex plate. A damaged flex plate can create serious and expensive damage. Broken flex plates cannot be repaired, they must be replaced. Pioneer Flex Plates are made of high-quality steel and contain the correct bolt hole spacing and ring gear teeth just like the original part to ensure long life and durability.
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Mr. Gasket – Mr. Gasket Flywheel Dust Cover, 5135 (Part No.5135)
from
$73.99
Keeps dust, rocks, and debris out of the flex plate and torque converter. *Needs modification for Olds/Pontiac Starters on the driver’s side.
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ATP – ATP Manual Transmission Flywheel Ring Gear, ZA-509 (Part No.ZA-509)
from
$34.99
The ring gear has teeth which engage with the starter motor allowing the engine to crank over and start. Repeated engagement with the starter results in worn or broken ring gear teeth. Once this is diagnosed, the ring gear must be replaced. Pioneer ring gears are designed to fit and function just like the original part to ensure durability and long life.
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Popular 1978 Jeep J20 Flywheels Categories
Most Popular Flywheel Ring Gear for 1978 Jeep J20s
Enhance your 1978 Jeep J20 with this popular Flywheel Ring Gear we have in stock, for $34.99.
ATP – ATP Manual Transmission Flywheel Ring Gear, ZA-509 (Part No.ZA-509)
from
$34.99
The ring gear has teeth which engage with the starter motor allowing the engine to crank over and start. Repeated engagement with the starter results in worn or broken ring gear teeth. Once this is diagnosed, the ring gear must be replaced. Pioneer ring gears are designed to fit and function just like the original part to ensure durability and long life.
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Best-Selling 1978 Jeep J20 Flywheel Shims
Upgrade your J20 with one of our 2 best-selling Flywheel Shims.
ATP – ATP Flywheel Shim, TS-5 (Part No.TS-5)
from
$29.99
ATP Flywheel Shims install easily restoring machined manual transmission flywheels back to the proper height. On automatic transmissions the shim takes up excessive clearance caused by engine crankshaft endplay or by installing a rebuilt torque converter or rebuilt front pump.
See More
ATP – ATP Flywheel Shim, TS-4 (Part No.TS-4)
from
$24.49
ATP Flywheel Shims install easily restoring machined manual transmission flywheels back to the proper height. On automatic transmissions the shim takes up excessive clearance caused by engine crankshaft endplay or by installing a rebuilt torque converter or rebuilt front pump.
See More
Top-Quality Flywheels and Flexplates for 1978 Jeep J20s
Choose a high-quality OEM or aftermarket Flywheels and Flexplate for Jeep J20s and enjoy top-notch performance from $67.99.
ATP – ATP Automatic Transmission Flex Plate, Z-104 (Part No.Z-104)
from
$67.99
Vehicles with automatic transmissions have a flex plate. The flex plates connects the engine and transmission. Most flex plates are made of a thick piece of sheet metal with bolt holes for the torque converter and teeth for the starter. The job of a flex plate is to allow for expansion of the torque converter as engine RPM increases. The constant expansion and contraction of a flex plate over time can result cracks and/or shearing of the flex plate. A damaged flex plate can create serious (expensive) damage. Broken flex plates can not be repaired, they must be replaced. ATP flex plates are made of high quality steel and contain the correct bolt hole spacing and ring gear teeth just like the original part to ensure long life and durability
See More
ATP – ATP Automatic Transmission Flex Plate, Z-131 (Part No.Z-131)
from
$86.99
Vehicles with automatic transmissions have a flex plate. The flex plates connect the engine and transmission. Most flex plates are made of a thick piece of sheet metal with bolt holes for the torque converter and teeth for the starter. The job of a flex plate is to allow for expansion of the torque converter as engine RPM increases. The constant expansion and contraction of a flex plate over time can result cracks and/or shearing of the flex plate. A damaged flex plate can create serious and expensive damage. Broken flex plates cannot be repaired, they must be replaced. Pioneer Flex Plates are made of high-quality steel and contain the correct bolt hole spacing and ring gear teeth just like the original part to ensure long life and durability.
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Our Top Pick for a 1978 Jeep J20 Clutch Flywheel Cover
Invest in a
durable Clutch Flywheel Cover for your 1978 Jeep, knowing you’re getting trusted brands and expert craftsmanship.
Mr. Gasket – Mr. Gasket Flywheel Dust Cover, 5135 (Part No.5135)
from
$73.99
Keeps dust, rocks, and debris out of the flex plate and torque converter. *Needs modification for Olds/Pontiac Starters on the driver’s side.
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FAQs for 1978 Jeep J20 Flywheels
What are the best-selling Flywheels for 1978 Jeep J20s?
Out of 6 Flywheels that fit 1978 Jeep J20s, the following parts are the top sellers:
- ATP Manual Transmission Flywheel Ring Gear, ZA-509 (3923436) – $34.99
- ATP Automatic Transmission Flex Plate, Z-104 (3922383) – $67.99
- ATP Automatic Transmission Flex Plate, Z-131 (3922626) – $86.99
What’s the price range for 1978 Jeep J20 Flywheels?
The prices of Flywheels for the 1978 Jeep J20 range from $24.49 up to $86.99 for the most premium parts.
What is the average price of a Flywheel for a 1978 Jeep J20?
The average price for Flywheels for the 1978 Jeep J20 is $50.68. Keep in mind the variety of part types within our Flywheel category, where you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Flywheels for other Jeep J20 model years?
What are the cheapest Flywheels for my 1978 Jeep J20?
The cheapest 1978 Jeep J20 Flywheels we carry are:
- ATP Flywheel Shim, TS-4 (10860807) – $24.49
- ATP Flywheel Shim, TS-5 (10860943) – $29.99
- ATP Manual Transmission Flywheel Ring Gear, ZA-509 (3923436) – $34.99
- ATP Automatic Transmission Flex Plate, Z-104 (3922383) – $67.99
- Mr. Gasket Flywheel Dust Cover, 5135 (10648807) – $73.99
Does Advance Auto Parts sell Flywheels for any other 1978 Jeep models?
Yes. We stock Flywheels for 5 other popular 1978 Jeep models. Some of the most popular are 1978 Cherokee Flywheels, 1978 Wagoneer Flywheels, 1978 J10 Flywheels, 1978 CJ7 Flywheels, and 1978 CJ5 Flywheels.
What are the top-rated Flywheels that fit the 1978 Jeep J20?
The one 1978 Jeep J20 Flywheel we have in stock is the ATP Flywheel Shim, TS-4. It costs $24.49.
What types of Flywheels do you sell for my 1978 Jeep J20?
As of 8/2/26, these are some of the most in-demand types of Flywheels for a 1978 Jeep J20:
Can I get help with 1978 Jeep J20 Flywheel orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Jeep Flywheels and more.
What is your return policy for Jeep J20 Flywheels?
Advance Auto Parts keeps returns simple. For new Jeep J20 Flywheels and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.