I've got a 1974 GMC Sprint project car. It was originally a 350 small-block Chevy with a TH350 trans, but I sold the engine and trans and installed a 454 [big-block] and TH400 trans in it.

Long before automatic transmissions like the 4L60E earned such bad reputations, General Motors entrusted the Turbo Hydra-Matic family to handle shifting duties in its legendary lineup of muscle cars.

Back in the '80s, General Motors introduced the Turbo 200 automatic overdrive transmission. Despite its use in the mighty Turbo V6 Buick, its failures in earlier applications gave it a bad reputation.