The Eldorado from 1982 uses a three-speed automatic transaxle for front-wheel drive—the Turbo-Hydramatic 425, or THM-425.
In more detail, the 1982 Eldorado was built on GM’s front-wheel-drive platform and paired with the THM-425 automatic transmission. This three-speed unit drives the front wheels via a transaxle that combines the transmission and differential, and it includes a torque converter with a lock-up feature to improve highway fuel economy. This setup reflects GM’s shift in that era toward front-wheel drive and compact automatic gearing for personal luxury cars.
Transmission configuration in the 1982 Eldorado
Key technical points about the THM-425 transaxle as installed in the Eldorado are outlined below.
- Configuration: Front-wheel-drive transaxle that combines the transmission and differential for the Eldorado’s drivetrain.
- Transmission type: Automatic (not manual), with three forward gears plus reverse.
- Model: Turbo-Hydramatic 425 (THM-425) family.
- Performance traits: Three forward speeds and a torque converter with a lock-up feature to enhance cruising efficiency.
In summary, the 1982 Eldorado uses a three-speed automatic transaxle, the THM-425, designed for front-wheel-drive operation and typical of GM’s early-1980s luxury cars. When maintaining one, ensure the torque converter and hydraulic controls are in good condition, and be mindful that this era’s transmissions can require careful servicing.
Identification and maintenance considerations
To verify the exact specification on a given vehicle, check the transaxle label or repair manual for references to THM-425, and consult the vehicle’s VIN/build sheet. Regular checks of fluid condition and shift behavior can help preserve a long service life for this transmission configuration.
Summary
The 1982 Cadillac Eldorado employs a front-wheel-drive, three-speed automatic transaxle known as the Turbo-Hydramatic 425 (THM-425), reflecting GM’s design choices for luxury cars in that era.