ProFit Transmission Kits

Tansmission Kits

American Powertrain is the world’s largest TREMEC dealer and the leader in model specific overdrive transmission installation systems. Tremec Elite Dealer Shop Transmission Kits Kit Specs

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American Powertrain ProFit installation systems

Perfect Fit
Professional Fit

Silver strong, quiet overdrive sport transmissions specially prepped to fit your car with a perfect fit.

Kits Available
Complete Kits

All the parts you need for installation in your muscle car, street rod, truck or sports car

Superior Performance
Superior Performance

Quick shifts and big power ratings

Crusing
Quiet Cruising

Great cruising RPMS – 18-50% drop in highway RPMs

Fueld Economy
Increased Fuel Economy

Great fuel mileage with 30-50% better on average

Made in USA
Made in USA

Installation parts made in the USA.


Find a ProKit Transmission for Your Vehicle


American Powertrain ProFit Transmission Kits

ProFit 5-Speed Kit

Featuring the TREMEC TKO 5-speed specially prepped for your model.

ProFit 5-Speed Kit
Kit Includes*
  • Revolution Shifter Mechanism – stock shift position for your project
  • Driveshaft - Seamless DOM w/solid u-joints (some of competition does not offer a driveshaft!)
  • X-Factor Cross Member – Light, strong modular aluminum
  • Trans Mount – modern poly or ISO-X ballistic
  • Pilot Bearing – stainless bearings
  • Reverse Light Harness – Weatherseal molded rubber
  • Speedometer Conversion – Choice of mechanical or electronic
  • Shifter Knob
  • Hardware
  • Instructions,  2-year REAL Warranty and Customer First Extended Hours Tech Support 

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*Transmission Kit contents vary by model


ProFit 6-Speed Kit

Features TREMEC Magnum 6-speed, specially prepped for you model

Pro-Fit 6-Speed Kit
Kit Includes*
  • Revolution Shifter Mechanism – stock shift position for your project
  • Driveshaft - Seamless DOM w/solid u-joints 
  • X-Factor Cross Member – Light, strong modular aluminum
  • Trans Mount – modern poly or ISO-X ballistic
  • Pilot Bearing – stainless bearings
  • Reverse Light Harness – Weatherpac plug and play
  • Reverse Lock-out Harness – Weatherpac plug and play
  • Speedometer Conversion – Choice of mechanical or electronic
  • Shifter Knob
  • Hardware
  • Instructions, 2-year REAL Warranty and Customer First Extended Hours Tech Support

Shop Now

*Transmission Kit contents vary by model


ProFit 4-Speed Automatic Kit

Features hand built 4-speed transmission, specially prepped for your model

ProFit 4-Speed Automatic Kit
Kit Includes*
  • Shifter Linkage – Converts your existing linkage to 4-speed for stock look
  • Torque Converter – Lock-up with choice of stall speed
  • Flexplate – Balanced SFI Steel
  • Driveshaft - Seamless DOM w/solid u-joints
  • X-Factor Cross Member – Light, strong modular aluminum
  • Trans Mount –AP ISO-X ballistic
  • Carb Linkage – Specify carb type when ordering
  • TV Cable – Fully adjustable
  • Converter Cover – Choice of black or polished
  • Speedometer Conversion – Calibrated
  • Locking Dip Stick
  • Hardware
  • Instructions, 2- Year REAL Warranty and Customer First Extended Hours Tech Support

Shop Now

*Transmission Kit contents vary by model

If you don’t know what you need call our technical sales staff at 931-646-4836 ext 107
  • 24/7 Customer First Exclusive 24/7 Customer First technical support line. 24-hours a day, nights, weekends, and holidays when you are most likely to be working on your car.
  • Expert Enthusiasts American Powertrain's team is manned by experienced enthusiasts with years of installation experience.
  • 2 Year Warranty Industry leading 24-month warranty from date of installations with 2-year installation grace period.
  • Fast Shipping Domestic and international shipping experts. Fast freight and overnight service available on all in stock items.