• Source: Turbo-Hydramatic 425

Turbo-Hydramatic 425 (TH425 or THM 425, later 325) was an automatic transmission developed and produced by General Motors. The THM425 was a derivative of the THM400; most parts directly interchange and some others will interchange with minor modifications. The internal parts spin the opposite direction in the THM425; the helical angle of the planetary gears is "reversed" and the one-way clutches freewheel in the opposite direction, for example. The THM425 was developed for the 1966 Oldsmobile Toronado and the 1967 Cadillac Eldorado. A lighter-duty transmission known as the THM325 (using components sourced from the THM200) replaced the THM425 in both car lines after the 1978 model year. 1979 and later longitudinal engine front-wheel drive vehicles used the THM325. The THM325 became the THM325-4L with an overdrive added in 1982, but all vehicles using this transmission switched to more-conventional transverse engine mounting in 1986. Bellhousing pattern used the 1967-90 Buick-Oldsmobile-Pontiac-Cadillac V8 pattern throughout its entire lifecycle.

Applications:

THM425
1971–1979 Cortez Motor Home
1966–1978 Oldsmobile Toronado
1967–1978 Cadillac Eldorado
1973–1978 GMC Motorhome
1973–1978 GMC TransMode multi-purpose vehicle
1972–1978 Revcon motorhome
1989–1993 Vector W8
THM325
1979–1981 Cadillac Eldorado
1979–1981 Oldsmobile Toronado
1980–1981 Cadillac Seville
THM325-4L
1982–1985 Buick Riviera
1982–1985 Cadillac Eldorado
1982–1985 Cadillac Seville
1982–1985 Oldsmobile Toronado




See also


Cadillac Eldorado
List of GM transmissions




References






External links


Troubleshooting manual (1969)

Kata Kunci Pencarian:

• Chevrolet Bel Air
• Chevrolet Suburban
• Turbo-Hydramatic 425
• Turbo-Hydramatic
• Vector W8
• GMC motorhome
• Oldsmobile V8 engine
• Cadillac Eldorado
• Oldsmobile Toronado
• Chevrolet Impala (fourth generation)
• Willow Run Transmission
• Oldsmobile 98