American Powertrain Profit Installation Systems

Professional Fit

Overdrive manual transmissions specially prepped to fit your car with a perfect fit.

Complete Kits

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

Superior Performance

Quick shifts and big power ratings

Quiet Cruising

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

Increased Fuel Economy

Great fuel mileage with 30-50% better on average

Made In USA

Installation parts made in the USA.

American Powertrain is the world’s largest TREMEC dealer and the leader in model specific overdrive transmission installation systems.