1966 Pontiac GTO Performance Transmissions

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Keep Your 1966 Pontiac GTO 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 1966 Pontiac GTO looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Performance Engine and Transmission Mounts, Performance Transmission Pan, and Performance Transmission Shift Kits. 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 1966 Pontiac GTO Performance Transmission at Advance Auto Parts is around $272.28, with a range that starts at $103.99 and goes up to $455.99. With 7 options in stock from 3 trusted brands, finding the right fit is easy. Popular picks like Lakewood Trans Mount: Urethane-Chevy, 24350, B & M Transpak For 65-87 Th400 Transmission, 20228, 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 Distributors and Performance Fuel Systems. At Advance Auto Parts, we’re here to help you keep your 1966 Pontiac GTO in peak condition, inside and out.

Essential 1966 Pontiac GTO Performance Transmissions

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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Top Street Performance – Top Street Performance LS Aluminum Low-Profile Retro-Fit Oil Pan with Added Clearance – Polished, 81075P (Part No.81075P)

Top Street Performance LS Aluminum Low-Profile Retro-Fit Oil Pan with Added Clearance - Polished, 81075P

from

$455.99
LS engines are among the most popular for swaps for their low expense and great power potential. Unfortunately, stock LS oil pans can’t always fit where you want them to. That’s where TSP’s low-profile, retro fit oil pan comes in. Composed of lightweight cast aluminum, it is designed to allow for increased clearance to the ground and chassis. It will fit many GM rear-wheel drive applications originally equipped with a small or big block Chevy engine and factory rear sump pan. Meticulously designed, it will mount perfectly to any wet-sump LS engine and take the stock oil filter. With a different take on our 81073, added cut-outs make the 81075 a great fit with the OEM Ford Fox Body K-member and rack and pinion. This pan also features a boss on each side for an oil return for turbochargers.
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Top Street Performance – Top Street Performance Black Aluminum Low-profile Retro-fit LS 5.5 Quart Oil Pan., 81073BK (Part No.81073BK)

Top Street Performance Black Aluminum Low-profile Retro-fit LS 5.5 Quart Oil Pan., 81073BK

from

$277.99
LS engines are among the most popular for swaps for their low expense and great power potential. Unfortunately, stock LS oil pans can’t always fit where you want them to. That’s where TSP’s low-profile, retro fit oil pan comes in. Composed of lightweight cast aluminum, it is designed to allow for increased clearance to the ground and chassis. It will fit many GM rear-wheel drive applications originally equipped with a small or big block Chevy engine and factory rear sump pan. Meticulously designed, it will mount perfectly to any wet-sump LS engine and take the stock oil filter. Volume: 5 quarts.
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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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Top Street Performance – Top Street Performance LS Aluminum Rear Sump Low-Profile Retro-Fit Oil Pan – Polished, 81073P (Part No.81073P)

Top Street Performance LS Aluminum Rear Sump Low-Profile Retro-Fit Oil Pan - Polished, 81073P

from

$455.99
LS engines are among the most popular for swaps for their low expense and great power potential. Unfortunately, stock LS oil pans can’t always fit where you want them to. That’s where TSP’s low-profile, retro fit oil pan comes in. Composed of lightweight cast aluminum, it is designed to allow for increased clearance to the ground and chassis. It will fit many GM rear-wheel drive applications originally equipped with a small or big block Chevy engine and factory rear sump pan. Meticulously designed, it will mount perfectly to any wet-sump LS engine and take the stock oil filter.
See More

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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Most Popular Performance Engine and Transmission Mount for 1966 Pontiac GTOs

Enhance your 1966 Pontiac GTO with this popular Performance Engine and Transmission Mount we have in stock, for $103.99.

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.
See More

Best-Selling 1966 Pontiac GTO Performance Transmission Pan

Upgrade your GTO with one of our 5 best-selling Performance Transmission Pan.

Top Street Performance – Top Street Performance LS Aluminum Rear Sump Low-Profile Retro-Fit Oil Pan – Polished, 81073P (Part No.81073P)

Top Street Performance LS Aluminum Rear Sump Low-Profile Retro-Fit Oil Pan - Polished, 81073P

from

$455.99
LS engines are among the most popular for swaps for their low expense and great power potential. Unfortunately, stock LS oil pans can’t always fit where you want them to. That’s where TSP’s low-profile, retro fit oil pan comes in. Composed of lightweight cast aluminum, it is designed to allow for increased clearance to the ground and chassis. It will fit many GM rear-wheel drive applications originally equipped with a small or big block Chevy engine and factory rear sump pan. Meticulously designed, it will mount perfectly to any wet-sump LS engine and take the stock oil filter.
See More

Top Street Performance – Top Street Performance LS Aluminum Low-Profile Retro-Fit Oil Pan with Added Clearance – Polished, 81075P (Part No.81075P)

Top Street Performance LS Aluminum Low-Profile Retro-Fit Oil Pan with Added Clearance - Polished, 81075P

from

$455.99
LS engines are among the most popular for swaps for their low expense and great power potential. Unfortunately, stock LS oil pans can’t always fit where you want them to. That’s where TSP’s low-profile, retro fit oil pan comes in. Composed of lightweight cast aluminum, it is designed to allow for increased clearance to the ground and chassis. It will fit many GM rear-wheel drive applications originally equipped with a small or big block Chevy engine and factory rear sump pan. Meticulously designed, it will mount perfectly to any wet-sump LS engine and take the stock oil filter. With a different take on our 81073, added cut-outs make the 81075 a great fit with the OEM Ford Fox Body K-member and rack and pinion. This pan also features a boss on each side for an oil return for turbochargers.
See More

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

Top Street Performance – Top Street Performance Black Aluminum Low-profile Retro-fit LS 5.5 Quart Oil Pan., 81073BK (Part No.81073BK)

Top Street Performance Black Aluminum Low-profile Retro-fit LS 5.5 Quart Oil Pan., 81073BK

from

$277.99
LS engines are among the most popular for swaps for their low expense and great power potential. Unfortunately, stock LS oil pans can’t always fit where you want them to. That’s where TSP’s low-profile, retro fit oil pan comes in. Composed of lightweight cast aluminum, it is designed to allow for increased clearance to the ground and chassis. It will fit many GM rear-wheel drive applications originally equipped with a small or big block Chevy engine and factory rear sump pan. Meticulously designed, it will mount perfectly to any wet-sump LS engine and take the stock oil filter. Volume: 5 quarts.
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

Top-Quality Performance Transmission Shift Kits for 1966 Pontiac GTOs

Choose a high-quality OEM or aftermarket Performance Transmission Shift Kit for Pontiac GTOs and enjoy top-notch performance from $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.
See More

FAQs for 1966 Pontiac GTO Performance Transmissions

What are the best-selling Performance Transmissions for 1966 Pontiac GTOs?

Out of 7 Performance Transmissions that fit 1966 Pontiac GTOs, the following parts are the top sellers:

What’s the price range for 1966 Pontiac GTO Performance Transmissions?

The prices of Performance Transmissions for the 1966 Pontiac GTO range from $103.99 up to $455.99 for the most premium parts.

What is the average price of a Performance Transmission for a 1966 Pontiac GTO?

The average price for Performance Transmissions for the 1966 Pontiac GTO is $272.28. 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 Pontiac GTO model years?

Yes, we carry Performance Transmissions for 8 model years of Pontiac GTOs between 1964 and 1973. The following model years are the most popular for Performance Transmission purchases: 1973, 1972, 1971, 1970, 1969, 1968, 1967, 1965, and 1964.

What are the cheapest Performance Transmissions for my 1966 Pontiac GTO?

Does Advance Auto Parts sell Performance Transmissions for any other 1966 Pontiac models?

What types of Performance Transmissions do you sell for my 1966 Pontiac GTO?

As of 8/2/26, these are some of the most in-demand types of Performance Transmissions for a 1966 Pontiac GTO:

Can I get help with 1966 Pontiac GTO Performance Transmission orders?

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

What is your return policy for Pontiac GTO Performance Transmissions?

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