1978 Jeep J20 Performance Transmissions

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Keep Your 1978 Jeep J20 in Top Shape with Quality Performance Transmissions

Whether you’re repairing or upgrading your Performance Transmission, 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 Performance Transmission Pan and Performance Engine and Transmission Mounts. 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 Performance Transmission at Advance Auto Parts is around $180.99, with a range that starts at $103.99 and goes up to $299.99. With 3 options in stock from 2 trusted brands, finding the right fit is easy. Popular picks like Lakewood Trans Mount: Urethane-Chevy, 24350, B & M Chrome Deep Th 400 Transmission Pan, 20289, and B & M Transmission Cast Deep Pan, Brushed Finish – Th400, 20280 start at just $103.99 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Performance Transmission, don’t forget to check out other key components like Performance Fuel Systems and Performance Oil Filters. At Advance Auto Parts, we’re here to help you keep your 1978 Jeep J20 in peak condition, inside and out.

Essential 1978 Jeep J20 Performance Transmissions

Energy Suspension – Energy Suspension Motor Mount, 2.1102G (Part No.2.1102G)

Energy Suspension Motor Mount, 2.1102G

from

$46.99
A true performance application component for cars, trucks, hot rods and racing and competition vehicles – yet designed to be also used for street vehicles. Soft-running enough to absorb vibrations for street use yet rugged for racing use. When required- a torque resistant safety interlock design is used that is comparable in strength to those too hard-running metal mounts. Replaces the original, short lived and typically too-soft rubber mounts and outdates those hard-running metal motor mounts. The popular early style mounts for General Motors vehicles are available in either zinc or chrome metal finishes. Made of Hyper-Flex performance polyurethane. Resistant to under vehicle fluid oils, coolants and road contaminants.
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Lakewood – Lakewood Trans Mount: Urethane-Chevy, 24350 (Part No.24350)

Lakewood Trans Mount: Urethane-Chevy, 24350

from

$103.99
Constructed of durable polyurethane to handle the stress oh high horsepower. Absorbs vibration and lasts longer than rubber Features unique built-in safety lock to keep from separating under high torque loads. Ideal for use on street or strip applications. Complete with grade-8 mounting hardware.
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B & M – B & M Chrome Deep Th 400 Transmission Pan, 20289 (Part No.20289)

B & M Chrome Deep Th 400 Transmission Pan, 20289

from

$138.99
Our Hi-Tek deep transmission pans are constructed from heavy gauge stamped steel and are designed and formed with rows of strengthening ribs adding structural rigidity. The pans are then finished off with high quality chrome plating for durable good looks. The deep pan design increases fluid capacity by 2-quarts over the stock O.E. pan, resulting in better heat dissipation, which helps lower temperatures prolonging the life of your transmission, trans fluid and corresponding components. Other features for this popular pan include a pan gasket, filter extension and drain port with magnetic drain plug for clean and easy servicing. Includes detailed instructions with all necessary hardware for an easy at home installation. Note: Does not fit Jeep CJ7 transmission.
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B & M – B & M Transmission Cast Deep Pan, Brushed Finish Tf727 518&61848Re Cummins, 10280 (Part No.10280)

B & M Transmission Cast Deep Pan, Brushed Finish Tf727 518&61848Re Cummins, 10280

from

$363.99
Our Hi-Tek deep transmission pans are constructed from A356-T6 aluminum and are cast with thick internal and external fins, adding additional strength and increased cooling properties. The deep pan design increases fluid capacity by 4-quarts over the stock O.E. steel pan. All these features combined help dissipate heat quicker netting lower transmission and fluid temperatures prolonging the life of your transmission, transmission fluid and corresponding components. Other features for this popular pan include a filter, filter extension, gasket and drain port with magnetic drain plug for clean and easy servicing. Also includes a 1/8-inch NPT temperature sensor port for easily adding a temp gauge for monitoring transmission temperatures while daily driving, towing or racing. Includes detailed instructions with all necessary hardware for an easy at home installation. Fits all Chrysler, Dodge, Plymouth A727 (RH36, RH37) A518 (46RH, 46RE) A618 (47RH, 47RE, 48RE) automatic transmissions.
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B & M – B & M Transmission Cast Deep Pan, Brushed Finish – Th400, 20280 (Part No.20280)

B & M Transmission Cast Deep Pan, Brushed Finish - Th400, 20280

from

$299.99
Our Hi-Tek deep transmission pans are constructed from A356-T6 aluminum and are cast with thick internal and external fins, adding additional strength and increased cooling properties. The deep pan design increases fluid capacity by 2-quarts over the stock O.E. steel pan. All these features combined help dissipate heat quicker netting lower transmission and fluid temperatures prolonging the life of your transmission, transmission fluid and corresponding components. Other features for this popular pan include a filter extension, pan gasket and drain port with magnetic drain plug for clean and easy servicing. Also includes a 1/8 inch NPT temperature sensor port for easily adding a temp gauge for monitoring transmission temperatures while daily driving, towing or racing. Includes detailed instructions with all necessary hardware for an easy at home installation.
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Most Popular Performance Transmission Pan for 1978 Jeep J20s

Enhance your 1978 Jeep J20 with one of the 2 Performance Transmission Pan we have in stock, starting at just $138.99.

B & M – B & M Transmission Cast Deep Pan, Brushed Finish – Th400, 20280 (Part No.20280)

B & M Transmission Cast Deep Pan, Brushed Finish - Th400, 20280

from

$299.99
Our Hi-Tek deep transmission pans are constructed from A356-T6 aluminum and are cast with thick internal and external fins, adding additional strength and increased cooling properties. The deep pan design increases fluid capacity by 2-quarts over the stock O.E. steel pan. All these features combined help dissipate heat quicker netting lower transmission and fluid temperatures prolonging the life of your transmission, transmission fluid and corresponding components. Other features for this popular pan include a filter extension, pan gasket and drain port with magnetic drain plug for clean and easy servicing. Also includes a 1/8 inch NPT temperature sensor port for easily adding a temp gauge for monitoring transmission temperatures while daily driving, towing or racing. Includes detailed instructions with all necessary hardware for an easy at home installation.
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B & M – B & M Chrome Deep Th 400 Transmission Pan, 20289 (Part No.20289)

B & M Chrome Deep Th 400 Transmission Pan, 20289

from

$138.99
Our Hi-Tek deep transmission pans are constructed from heavy gauge stamped steel and are designed and formed with rows of strengthening ribs adding structural rigidity. The pans are then finished off with high quality chrome plating for durable good looks. The deep pan design increases fluid capacity by 2-quarts over the stock O.E. pan, resulting in better heat dissipation, which helps lower temperatures prolonging the life of your transmission, trans fluid and corresponding components. Other features for this popular pan include a pan gasket, filter extension and drain port with magnetic drain plug for clean and easy servicing. Includes detailed instructions with all necessary hardware for an easy at home installation. Note: Does not fit Jeep CJ7 transmission.
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Best-Selling 1978 Jeep J20 Performance Engine and Transmission Mount

Upgrade your J20 with our best-selling Performance Engine and Transmission Mount.

Lakewood – Lakewood Trans Mount: Urethane-Chevy, 24350 (Part No.24350)

Lakewood Trans Mount: Urethane-Chevy, 24350

from

$103.99
Constructed of durable polyurethane to handle the stress oh high horsepower. Absorbs vibration and lasts longer than rubber Features unique built-in safety lock to keep from separating under high torque loads. Ideal for use on street or strip applications. Complete with grade-8 mounting hardware.
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FAQs for 1978 Jeep J20 Performance Transmissions

What are the best-selling Performance Transmissions for 1978 Jeep J20s?

Out of 3 Performance Transmissions that fit 1978 Jeep J20s, the following parts are the top sellers:

What’s the price range for 1978 Jeep J20 Performance Transmissions?

The prices of Performance Transmissions for the 1978 Jeep J20 range from $103.99 up to $299.99 for the most premium parts.

What is the average price of a Performance Transmission for a 1978 Jeep J20?

The average price for Performance Transmissions for the 1978 Jeep J20 is $180.99. Keep in mind the variety of part types within our Performance Transmission category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Performance Transmissions for other Jeep J20 model years?

Yes, we carry Performance Transmissions for 13 model years of Jeep J20s between 1974 and 1988. The following model years are the most popular for Performance Transmission purchases: 1977, 1975, 1974, 1985, 1986, 1988, 1987, 1976, and 1980.

What are the cheapest Performance Transmissions for my 1978 Jeep J20?

The cheapest 1978 Jeep J20 Performance Transmissions we carry are:

Does Advance Auto Parts sell Performance Transmissions for any other 1978 Jeep models?

Yes. We stock Performance Transmissions for 5 other popular 1978 Jeep models. Some of the most popular are 1978 Cherokee Performance Transmissions, 1978 J10 Performance Transmissions, 1978 CJ7 Performance Transmissions, 1978 CJ5 Performance Transmissions, and 1978 Wagoneer Performance Transmissions.

What types of Performance Transmissions do you sell for my 1978 Jeep J20?

As of 8/2/26, these are some of the most in-demand types of Performance Transmissions for a 1978 Jeep J20:

Can I get help with 1978 Jeep J20 Performance Transmission orders?

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

What is your return policy for Jeep J20 Performance Transmissions?

Advance Auto Parts keeps returns simple. For new Jeep J20 Performance Transmissions and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.