There are few things in the world of high-performance cars that are truly reliable. One would have to be the GM TH400 automatic. As durable as this three-speed juicebox is, there is still room for ...

General Motors' Hydramatic Division can take credit for having designed and produced the most rugged and dependable domestic automatic transmissions ever done. In fact, the Hydramatics are so darned ...

In the 1960s, General Motors started manufacturing a new three-speed automatic transmission named the Turbo Hydra-Matic 400 (TH400) that saw first use in 1964. Commonly called the Turbo 400, it was so ...