1977 Chevrolet K20 Performance Transmissions

Please Select your Vehicle to See Exact Fit Parts

Keep Your 1977 Chevrolet K20 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 1977 Chevrolet K20 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 Engine and Transmission Mounts, and Performance Transmission Dipstick Tubes. 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 1977 Chevrolet K20 Performance Transmission at Advance Auto Parts is around $167.56, with a range that starts at $90.99 and goes up to $311.99. With 10 options in stock from 4 trusted brands, finding the right fit is easy. Popular picks like Energy Suspension Motor And Transmission Mount, 3.1130R, Energy Suspension Transmission Mount, 3.1106R, and Lakewood Trans Mount: Urethane-Chevy, 24350 start at just $90.99 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 1977 Chevrolet K20 in peak condition, inside and out.

Essential 1977 Chevrolet K20 Performance Transmissions

Energy Suspension – Energy Suspension Transmission Mount, 3.1132G (Part No.3.1132G)

Energy Suspension Transmission Mount, 3.1132G

from

$105.99
A true performance application component for cars, trucks, hot rods. For racing/competition, yet popularly used for street vehicles when more horsepower is added. Soft running enough to absorb vibrations for street use yet rugged for racing use. Helps control torque on high performance vehicles. Maintains proper drive shaft angle to help prevent early wear and unexpected power train damage. Replaces the original, short lived and typically too-soft rubber mounts and outdates those hard-running metal transmission mounts. Resistant to under vehicle fluid oils, coolants and road contaminants. Made of Energy’s Hyper-Flex performance polyurethane and heavy duty hardware – for added durability.
See More

Energy Suspension – Energy Suspension Transmission Mount, 3.1106R (Part No.3.1106R)

Energy Suspension Transmission Mount, 3.1106R

from

$90.99
A true performance application component for cars, trucks, hot rods. For racing/competition, yet popularly used for street vehicles when more horsepower is added. Soft running enough to absorb vibrations for street use yet rugged for racing use. Helps control torque on high performance vehicles. Maintains proper drive shaft angle to help prevent early wear and unexpected power train damage. Replaces the original, short lived and typically too-soft rubber mounts and outdates those hard-running metal transmission mounts. Resistant to under vehicle fluid oils, coolants and road contaminants. Made of Energy’s Hyper-Flex performance polyurethane and heavy duty hardware – for added durability.
See More

Energy Suspension – Energy Suspension Motor And Transmission Mount, 3.1130R (Part No.3.1130R)

Energy Suspension Motor And Transmission Mount, 3.1130R

from

$116.99
Energy Suspension continues to be the World leader in performance polyurethane suspension technology. Dedication to manufacturing and developing superior products has established Energy Suspension as the most asked-for name in performance polyurethane components today. The complex and diverse nature of Energy’s proprietary Hyper-Flex material requires constant attention to developing the optimum polyurethane formulas. This devotion has produced the quality components that our customers continue to demand. Providing problem-solving solutions with applications for the most popular vehicles, paired with our Limited warranty and superb customer support, Energy Suspension is your first quality choice in performance polyurethane suspension components.
See More

Energy Suspension – Energy Suspension Motor Mount, 3.1145R (Part No.3.1145R)

Energy Suspension Motor Mount, 3.1145R

from

$66.99
A true performance application component for cars, trucks, hot rods and racing/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 fluids such as: oils, coolants, road contaminants, etc.
See More

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

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.
See More

Mr. Gasket – Mr. Gasket Transmission Oil Pan – Polished Aluminum, 9791G (Part No.9791G)

Mr. Gasket Transmission Oil Pan - Polished Aluminum, 9791G

from

$141.99
These pans are offered in stock depth or deep with extra capacity and available in both steel and aluminum to fit your specific needs. Each kit Includes the drain plug, gasket and hardware.
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

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

Mr. Gasket – Mr. Gasket A/Tdipstick, 9703G (Part No.9703G)

Mr. Gasket A/Tdipstick, 9703G

from

$101.99
Billet aluminum handle with flexible braded steel tube mounts to the firewall. 29-3/4 inch long.
See More

B & M – B & M Transpak For 82-93 Th700R4 Transmission, 70235 (Part No.70235)

B & M Transpak For 82-93 Th700R4 Transmission, 70235

from

$212.99
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 1982-1993 GM TH700R4/4L60 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. Note: Not for GM 4L60E electronic transmissions.
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.
See More

Most Popular Performance Transmission Shift Kit for 1977 Chevrolet K20s

Enhance your 1977 Chevrolet K20 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.
See More

Best-Selling 1977 Chevrolet K20 Performance Engine and Transmission Mounts

Upgrade your K20 with one of our 4 best-selling Performance Engine and Transmission Mounts.

Energy Suspension – Energy Suspension Motor And Transmission Mount, 3.1130R (Part No.3.1130R)

Energy Suspension Motor And Transmission Mount, 3.1130R

from

$116.99
Energy Suspension continues to be the World leader in performance polyurethane suspension technology. Dedication to manufacturing and developing superior products has established Energy Suspension as the most asked-for name in performance polyurethane components today. The complex and diverse nature of Energy’s proprietary Hyper-Flex material requires constant attention to developing the optimum polyurethane formulas. This devotion has produced the quality components that our customers continue to demand. Providing problem-solving solutions with applications for the most popular vehicles, paired with our Limited warranty and superb customer support, Energy Suspension is your first quality choice in performance polyurethane suspension components.
See More

Energy Suspension – Energy Suspension Transmission Mount, 3.1106R (Part No.3.1106R)

Energy Suspension Transmission Mount, 3.1106R

from

$90.99
A true performance application component for cars, trucks, hot rods. For racing/competition, yet popularly used for street vehicles when more horsepower is added. Soft running enough to absorb vibrations for street use yet rugged for racing use. Helps control torque on high performance vehicles. Maintains proper drive shaft angle to help prevent early wear and unexpected power train damage. Replaces the original, short lived and typically too-soft rubber mounts and outdates those hard-running metal transmission mounts. Resistant to under vehicle fluid oils, coolants and road contaminants. Made of Energy’s Hyper-Flex performance polyurethane and heavy duty hardware – for added durability.
See More

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

Energy Suspension – Energy Suspension Transmission Mount, 3.1132G (Part No.3.1132G)

Energy Suspension Transmission Mount, 3.1132G

from

$105.99
A true performance application component for cars, trucks, hot rods. For racing/competition, yet popularly used for street vehicles when more horsepower is added. Soft running enough to absorb vibrations for street use yet rugged for racing use. Helps control torque on high performance vehicles. Maintains proper drive shaft angle to help prevent early wear and unexpected power train damage. Replaces the original, short lived and typically too-soft rubber mounts and outdates those hard-running metal transmission mounts. Resistant to under vehicle fluid oils, coolants and road contaminants. Made of Energy’s Hyper-Flex performance polyurethane and heavy duty hardware – for added durability.
See More

Top-Quality Performance Transmission Dipstick Tubes for 1977 Chevrolet K20s

Choose a high-quality OEM or aftermarket Performance Transmission Dipstick Tube for Chevrolet K20s and enjoy top-notch performance from $101.99.

Mr. Gasket – Mr. Gasket A/Tdipstick, 9703G (Part No.9703G)

Mr. Gasket A/Tdipstick, 9703G

from

$101.99
Billet aluminum handle with flexible braded steel tube mounts to the firewall. 29-3/4 inch long.
See More

Top Picks for 1977 Chevrolet K20 Performance Transmission Pan

Invest in one of our 4 durable Performance Transmission Pan for your 1977 Chevrolet, knowing you’re getting trusted brands and expert craftsmanship.

Mr. Gasket – Mr. Gasket Transmission Oil Pan – Polished Aluminum, 9791G (Part No.9791G)

Mr. Gasket Transmission Oil Pan - Polished Aluminum, 9791G

from

$141.99
These pans are offered in stock depth or deep with extra capacity and available in both steel and aluminum to fit your specific needs. Each kit Includes the drain plug, gasket and hardware.
See More

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.
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

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 1977 Chevrolet K20 Performance Transmissions

What are the best-selling Performance Transmissions for 1977 Chevrolet K20s?

Out of 10 Performance Transmissions that fit 1977 Chevrolet K20s, the following parts are the top sellers:

What’s the price range for 1977 Chevrolet K20 Performance Transmissions?

The prices of Performance Transmissions for the 1977 Chevrolet K20 range from $90.99 up to $311.99 for the most premium parts.

What is the average price of a Performance Transmission for a 1977 Chevrolet K20?

The average price for Performance Transmissions for the 1977 Chevrolet K20 is $167.56. 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 K20 model years?

Yes, we carry Performance Transmissions for 10 model years of Chevrolet K20s between 1975 and 1986. The following model years are the most popular for Performance Transmission purchases: 1986, 1985, 1984, 1983, 1982, 1981, 1980, 1979, and 1978.

What are the cheapest Performance Transmissions for my 1977 Chevrolet K20?

The cheapest 1977 Chevrolet K20 Performance Transmissions we carry are:

Does Advance Auto Parts sell Performance Transmissions for any other 1977 Chevrolet models?

What types of Performance Transmissions do you sell for my 1977 Chevrolet K20?

As of 8/2/26, these are some of the most in-demand types of Performance Transmissions for a 1977 Chevrolet K20:

Can I get help with 1977 Chevrolet K20 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 K20 Performance Transmissions?

Advance Auto Parts keeps returns simple. For new Chevrolet K20 Performance Transmissions and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.