1984 Chevrolet P20 Performance Transmissions

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Keep Your 1984 Chevrolet P20 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 1984 Chevrolet P20 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Performance Transmission Shift Kits, Performance Transmission Kickdown Cable, and Performance Transmission Pan. 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 1984 Chevrolet P20 Performance Transmission at Advance Auto Parts is around $171.07, with a range that starts at $72.29 and goes up to $299.99. With 4 options in stock from one trusted brand, finding the right fit is easy. Popular picks like B & M Transmission Cast Deep Pan, Brushed Finish – Th400, 20280, B & M Chrome Deep Th 400 Transmission Pan, 20289, and B & M Transpak For 65-87 Th400 Transmission, 20228 start at just $138.99 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 1984 Chevrolet P20 in peak condition, inside and out.

Essential 1984 Chevrolet P20 Performance Transmissions

B & M – B & M Transmission Cast Deep Pan, Brushed Finish Th-350, 30280 (Part No.30280)

B & M Transmission Cast Deep Pan, Brushed Finish Th-350, 30280

from

$311.99
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 3-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, 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 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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B & M – B & M Transpak For 65-87 Th400 Transmission, 20228 (Part No.20228)

B & M Transpak For 65-87 Th400 Transmission, 20228

from

$172.99
The B&M Transpak is the next step up from the B&M Shift Improver kit. It has all the features in the Shift Improver kit, plus it provides additional driver manual control (GM TH-400, 350, Ford C-6 and Chrysler Torqueflite only). B&M Transpak kit for 1965-1987 GM TH400/375 automatic transmissions. Most stock automatic transmissions won’t downshift into low gear above 15 mph, and automatically upshift at a predetermined speed no matter what gear you’re in. With the Transpak, you can downshift at any speed, and you can hold the transmission in first gear to any speed that you want! This is an asset when you’ve got a modified engine, and you want additional RPMs, or you’re towing a trailer or driving heavy loads downhill. Stage 1. Heavy Duty is for street rods, normal passenger vehicles or other heavy duty use. Firmer shift feel but not harsh. Improves transmission performance and life dramatically without loss of comfort and offers normal automatic operation when in Drive. Stage 2 is for Hi-Performance street use. Essentially the same as Heavy Duty mode except shifts are much quicker. Retains full automatic features and standard shift points with selector in Drive.
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B & M – B & M Throttle Valve Cable, Th700R4 Transmission, 70242 (Part No.70242)

B & M Throttle Valve Cable, Th700R4 Transmission, 70242

from

$72.29
These universal fit adjustable cables will work in 95% of all listed transmission applications, yet are less expensive than OE models. Use as straight replacement cable or ease the installation of transmission swaps.
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Most Popular Performance Transmission Shift Kit for 1984 Chevrolet P20s

Enhance your 1984 Chevrolet P20 with this popular Performance Transmission Shift Kit we have in stock, for $172.99.

B & M – B & M Transpak For 65-87 Th400 Transmission, 20228 (Part No.20228)

B & M Transpak For 65-87 Th400 Transmission, 20228

from

$172.99
The B&M Transpak is the next step up from the B&M Shift Improver kit. It has all the features in the Shift Improver kit, plus it provides additional driver manual control (GM TH-400, 350, Ford C-6 and Chrysler Torqueflite only). B&M Transpak kit for 1965-1987 GM TH400/375 automatic transmissions. Most stock automatic transmissions won’t downshift into low gear above 15 mph, and automatically upshift at a predetermined speed no matter what gear you’re in. With the Transpak, you can downshift at any speed, and you can hold the transmission in first gear to any speed that you want! This is an asset when you’ve got a modified engine, and you want additional RPMs, or you’re towing a trailer or driving heavy loads downhill. Stage 1. Heavy Duty is for street rods, normal passenger vehicles or other heavy duty use. Firmer shift feel but not harsh. Improves transmission performance and life dramatically without loss of comfort and offers normal automatic operation when in Drive. Stage 2 is for Hi-Performance street use. Essentially the same as Heavy Duty mode except shifts are much quicker. Retains full automatic features and standard shift points with selector in Drive.
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Best-Selling 1984 Chevrolet P20 Performance Transmission Kickdown Cable

Upgrade your P20 with our best-selling Performance Transmission Kickdown Cable.

B & M – B & M Throttle Valve Cable, Th700R4 Transmission, 70242 (Part No.70242)

B & M Throttle Valve Cable, Th700R4 Transmission, 70242

from

$72.29
These universal fit adjustable cables will work in 95% of all listed transmission applications, yet are less expensive than OE models. Use as straight replacement cable or ease the installation of transmission swaps.
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Top-Quality Performance Transmission Pan for 1984 Chevrolet P20s

Choose a high-quality OEM or aftermarket Performance Transmission Pan for Chevrolet P20s and enjoy top-notch performance from $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.
See More

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.
See More

FAQs for 1984 Chevrolet P20 Performance Transmissions

What are the best-selling Performance Transmissions for 1984 Chevrolet P20s?

Out of 4 Performance Transmissions that fit 1984 Chevrolet P20s, the following parts are the top sellers:

What’s the price range for 1984 Chevrolet P20 Performance Transmissions?

The prices of Performance Transmissions for the 1984 Chevrolet P20 range from $72.29 up to $299.99 for the most premium parts.

What is the average price of a Performance Transmission for a 1984 Chevrolet P20?

The average price for Performance Transmissions for the 1984 Chevrolet P20 is $171.07. 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 Chevrolet P20 model years?

Yes, we carry Performance Transmissions for 13 model years of Chevrolet P20s between 1975 and 1989. The following model years are the most popular for Performance Transmission purchases: 1989, 1988, 1987, 1986, 1985, 1983, 1982, 1981, and 1980.

What are the cheapest Performance Transmissions for my 1984 Chevrolet P20?

The cheapest 1984 Chevrolet P20 Performance Transmissions we carry are:

Does Advance Auto Parts sell Performance Transmissions for any other 1984 Chevrolet models?

Yes. We stock Performance Transmissions for 20 other popular 1984 Chevrolet models. Some of the most popular are 1984 Impala Performance Transmissions, 1984 Camaro Performance Transmissions, 1984 Monte Carlo Performance Transmissions, 1984 Caprice Performance Transmissions, and 1984 S10 Performance Transmissions.

What types of Performance Transmissions do you sell for my 1984 Chevrolet P20?

As of 8/2/26, these are some of the most in-demand types of Performance Transmissions for a 1984 Chevrolet P20:

Can I get help with 1984 Chevrolet P20 Performance Transmission orders?

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

What is your return policy for Chevrolet P20 Performance Transmissions?

Advance Auto Parts keeps returns simple. For new Chevrolet P20 Performance Transmissions and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.