Description
B and M Trans Pak, GM TH400 or TH375 Transmission
The B&M Transpak is the next step up from the B&M Shift Improver Kit, offering enhanced manual control and optimized performance for your automatic transmission. Designed for 19651987 GM TH400/375 transmissions, this kit recalibrates your transmission for quicker, firmer shifts and longer life. With the Transpak, you can downshift at any speed and hold first gear as long as you wantperfect for performance driving, towing, or heavy-duty use.
- Fits 19651987 GM TH400 and TH375 automatic transmissions
- Allows manual downshifting at any speed for increased driver control
- Stage 1 (Heavy Duty): Firmer shifts for street rods and everyday use
- Stage 2 (Hi-Performance): Quicker, more aggressive shifts for performance builds
- Improves transmission life and overall performance
- Retains full automatic operation when in Drive
- Ideal for modified engines, towing, or high-load applications
- Provides optimum performance and reliability under demanding conditions
- Built with over 65 years of B&M engineering excellence
GM TH400 Transmission Years:
1965 (65), 1966 (66), 1967 (67), 1968 (68), 1969 (69), 1970 (70), 1971 (71), 1972 (72), 1973 (73), 1974 (74), 1975 (75), 1976 (76), 1977 (77), 1978 (78), 1979 (79), 1980 (80), 1981 (81), 1982 (82), 1983 (83), 1984 (84), 1985 (85), 1986 (86), 1987 (87)
