Turbo-Hydramatic 425

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Turbo-Hydramatic 425/325/325-4L
Manufacturer General Motors
Production 19661985
Successor 4T60
Class 3-speed longitudinal automatic transmission
Related Turbo-Hydramatic 125
Turbo-Hydramatic
Turbo-Hydramatic 180
Similar Ford C-4/C-5

Turbo-Hydramatic 425 (and later 325) was an automatic transmission developed and produced by General Motors . It was a derivative of the Turbo-Hydramatic developed for the 1966 Oldsmobile Toronado and 1967 Cadillac Eldorado and later used for other longitudinal engine front-wheel drive vehicles as the 325. The TH325 became the TH325-4L with an overdrive added in 1982, but all vehicles using this transmission switched to more-conventional transverse engine mounting in 1986.

Applications:

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