what is a trans brake?
A transmission brake is usually considered a drag racing "only" automotive after-market device. It operates by simultaneously applying the forward and reverse clutch packs of an automatic transmission while its both in gear, and the torque converter is at or near it's stall speed. At the moment the trans-brake is disengaged the reverse element is released (usually the engine is revving at peak power) and the car will immediately lunge forward from its starting position.
