Along with the THM200-4R, General Motors’ THM700-R4 automatic transmission was the last of GM’s Turbohydramatic transmission series.

First introduced in the 1960s, GMs Turbohydramatic transmissions were successors to the Powerglide transmission, and included the popular THM350 and THM400 models. The THM700-R4, first used on the 1982 Chevrolet Corvette, was primarily designed for use on trucks and larger automobiles.

Identification of the THM700-R4 automatic transmission is accomplished by locating visual clues separating it from other GM and Chevrolet automatic transmissions and by decoding the information found on the identification tag.