Description
B and M Trans Pak, GM TH350 Transmission
The B&M Transpak is the next step up from the B&M Shift Improver Kit, offering more control and performance options for your transmission. Designed for 19681981 GM TH350 automatic transmissions, this kit enhances shift quality, improves transmission life, and provides greater driver control. With the Transpak, you can manually downshift at any speed and hold first gear as long as desiredideal for modified engines, towing, or heavy-load driving.
- Fits 19681981 GM TH350 automatic transmissions
- Does not fit TH350C models
- Allows downshifting at any speed and full manual control of first gear
- Stage 1 (Heavy Duty): For street rods, passenger cars, and heavy-duty use; firmer but comfortable shifts
- Stage 2 (Hi-Performance): For high-performance street applications; quicker, more aggressive shifts
- Improves transmission performance, durability, and response
- Retains full automatic operation when in Drive
- Ideal for towing, high-RPM applications, or enhanced street performance
GM TH350 Transmission Years:
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)









