American PowerTrain - GM

Transmission Kits - GM

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Transmission Kits - GM - F-body
Transmission Kits - GM - Corvette
Our Pro-Fit TREMEC based Corvette kits are the best engineered Corvette kits on the market. Our patented offset White Lightning Shifter will ensure perfect shifter location and unlike our...More Details »
Transmission Kits - GM - Truck
Transmission Kits - GM -  A-body
Transmission Kits - GM -  B-body
Transmission Kits - GM - Tri-Five
We can custom build your Tri-Five transmission package from mild to wild. Full auto to manual conversion and 4-speed to 5 or 6-speed conversion. Give us a call at 931-646-4836
Transmission Kits - GM - X-Body
If you don’t know what you need call our technical sales staff at 931-646-4836
  • Tech Line Support Our tech lines are manned 7:00 AM – 7:00PM CST M-F. Plus, we have a call back service on weekends and holidays.
  • 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.