Gearing is all about getting the power from the engine to the ground. The right ratios can help you crawl over the biggest obstacles or cruise the highway at low RPM.

Driveline angles can be the difference between a smooth ride and your teeth vibrating out of your skull! This 101 course will help you measure and correct your driveline angles.

The rear axle ratio of your car is instrumental in determining which transmission gear set is best suited for your car. It is also important to know the ratio as well as tire size to determine which speedometer gear you need so your speedometer reads accurately.  By following these directions, you can determine what the axle ratio is in your car.

Go from trail to highway with the TREMEC TR-4050 5-Speed.

The Magnum XL is the longest aftermarket transmission TREMEC makes! Choose between the Ford or GM versions.

The Magnum XL is the longest aftermarket transmission TREMEC makes! Choose between the GM or Ford versions.

The Magnum-F is intended to serve as a replacement upgrade for the now-defunct T-56 transmissions found in 4th-Gen GM F-bodies (1993-2002 Chevrolet Camaro and Pontiac Firebird).

The TREMEC Magnum 6-Speed is the pinnacle of heavy-duty street performance manual transmissions. We have kits for AMC, Ford, GM, and Mopar applications.

This transmission is a popular choice for moderately powered Fords, 1968-1979 Corvette, and Mopar A-bodies.