The B&M® Transpak is the next step up from the B&M Shift Improver kit. It has all the features in the Shift Improver kit, plus it provides additional driver manual control (GM TH-400, 350, Ford C-6 and Chrysler Torqueflite only). B&M® Transpak™ kit for 1965-1987 GM TH400/375 automatic transmissions. Most stock automatic transmissions won't downshift into low gear above 15 mph, and automatically upshift at a predetermined speed no matter what gear you're in. With the Transpak, you can downshift at any speed, and you can hold the transmission in first gear to any speed that you want! This is an asset when you've got a modified engine, and you want additional RPMs, or you're towing a trailer or driving heavy loads downhill. Stage 1. Heavy Duty is for street rods, normal passenger vehicles or other heavy duty use. Firmer shift feel but not harsh. Improves transmission performance and life dramatically without loss of comfort and offers normal automatic operation when in Drive. Stage 2 is for Hi-Performance street use. Essentially the same as Heavy Duty mode except shifts are much quicker. Retains full automatic features and standard shift points with selector in Drive.
Features:
- Recalibrate's GM TH400 Automatic Transmissions
- Full Manual Control on Most Transmissions
- Over 65 Years of B&M Quality
- Improves Transmission Life
- Optimum Performance
- Firmer Shifts
Fits 1965-1987 GM Turbo-Hydramatic 400, Turbo-Hydramatic 375 automatic transmissions.
Installation Notes:
Fits 1965-1987 GM Turbo-Hydramatic 400, Turbo-Hydramatic 375 automatic transmissions.
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About B&M Racing
B&M® specializes in performance automatic transmissions, torque converters, SFI approved flexplates, legendary automatic shifters, precision manual shifters, and many other transmission products including cast deep aluminum transmission pans, transmission coolers, and automatic transmission fluid. B&M Performance & Off-Road has been at the vanguard of the growing automotive aftermarket since the early 1950s. Racers themselves, B&M’s founders identified the needs of local performance enthusiasts and developed products to fill those needs. B&M specializes in performance automatic transmissions, torque converters, SFI approved flexplates, legendary automatic shifters, precision manual shifters, automatic shift handles, extended transfer case handles, cast deep aluminum transmission pans, differential covers, transmission coolers, power steering coolers, automatic transmission fluid, and transmission accessories for performance street, truck, Jeep, and off-road applications.
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Vehicle Fitment:
The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make |
Model |
Years |
Engine |
Chevrolet |
Bel Air |
1965 |
5.3L / 327 / V8 |
Chevrolet |
Bel Air |
1966 |
7.0L / 427 / V8 |
Chevrolet |
Bel Air |
1967 |
7.0L / 427 / V8 |
Chevrolet |
Bel Air |
1968 |
5.0L / 307 / V8 |
Chevrolet |
Bel Air |
1969 |
6.5L / 396 / V8 |
Chevrolet |
Bel Air |
1970 |
6.6L / 402 / V8 |
Chevrolet |
Bel Air |
1971 |
6.6L / 402 / V8 |
Chevrolet |
Bel Air |
1972 |
5.7L / 350 / V8 |
Chevrolet |
Bel Air |
1973 |
7.4L / 454 / V8 |
Chevrolet |
Bel Air |
1974 |
5.7L / 350 / V8 |
Chevrolet |
Bel Air |
1975 |
6.6L / 400 / V8 |
Chevrolet |
Biscayne |
1965 |
4.6L / 283 / V8 |
Chevrolet |
Biscayne |
1966 |
7.0L / 427 / V8 |
Chevrolet |
Biscayne |
1967 |
7.0L / 427 / V8 |
Chevrolet |
Biscayne |
1968 |
7.0L / 427 / V8 |
Chevrolet |
Biscayne |
1969 |
5.7L / 350 / V8 |
Chevrolet |
Biscayne |
1970 |
5.7L / 350 / V8 |
Chevrolet |
Biscayne |
1971 |
5.7L / 350 / V8 |
Chevrolet |
Biscayne |
1972 |
5.7L / 350 / V8 |
Chevrolet |
Brookwood |
1969 |
5.3L / 327 / V8 |
Chevrolet |
Brookwood |
1970 |
5.7L / 350 / V8 |
Chevrolet |
Brookwood |
1971 |
5.0L / 307 / V8 |
Chevrolet |
Brookwood |
1972 |
5.0L / 307 / V8 |
Chevrolet |
Caprice |
1966 |
4.6L / 283 / V8 |
Chevrolet |
Caprice |
1967 |
5.3L / 327 / V8 |
Chevrolet |
Caprice |
1968 |
7.0L / 427 / V8 |
Chevrolet |
Caprice |
1969 |
5.7L / 350 / V8 |
Chevrolet |
Caprice |
1970 |
5.7L / 350 / V8 |
Chevrolet |
Caprice |
1971 |
5.7L / 350 / V8 |
Chevrolet |
Caprice |
1972 |
5.7L / 350 / V8 |
Chevrolet |
Caprice |
1973 |
5.7L / 350 / V8 |
Chevrolet |
Caprice |
1974 |
5.7L / 350 / V8 |
Chevrolet |
Caprice |
1975 |
5.7L / 350 / V8 |
Chevrolet |
Caprice |
1976 |
5.7L / 350 / V8 |
Chevrolet |
Caprice |
1977 |
5.7L / 350 / V8 |
Chevrolet |
Caprice |
1978 |
5.7L / 350 / V8 |
Chevrolet |
Caprice |
1979 |
5.7L / 350 / V8 |
Chevrolet |
Caprice |
1980 |
5.7L / 350 / V8 |
Chevrolet |
Caprice |
1981 |
5.7L / 350 / V8 |
Chevrolet |
Caprice |
1982 |
5.7L / 350 / V8 |
Chevrolet |
Caprice |
1983 |
5.7L / 350 / V8 |
Chevrolet |
Caprice |
1984 |
5.7L / 350 / V8 |
Chevrolet |
Caprice |
1985 |
5.7L / 350 / V8 |
Chevrolet |
Caprice |
1986 |
5.7L / 350 / V8 |
Chevrolet |
Caprice |
1987 |
5.7L / 350 / V8 |
Chevrolet |
Estate |
1969 |
5.7L / 350 / V8 |
Chevrolet |
Estate |
1970 |
5.7L / 350 / V8 |
Chevrolet |
Impala |
1965 |
5.4L / 327 / V8 |
Chevrolet |
Impala |
1966 |
5.4L / 327 / V8 |
Chevrolet |
Impala |
1969 |
5.7L / 350 / V8 |
Chevrolet |
Impala |
1970 |
5.7L / 350 / V8 |
Chevrolet |
Impala |
1971 |
5.7L / 350 / V8 |
Chevrolet |
Impala |
1972 |
5.7L / 350 / V8 |
Chevrolet |
Impala |
1973 |
5.7L / 350 / V8 |
Chevrolet |
Impala |
1974 |
5.7L / 350 / V8 |
Chevrolet |
Impala |
1975 |
5.7L / 350 / V8 |
Chevrolet |
Impala |
1976 |
5.7L / 350 / V8 |
Chevrolet |
Impala |
1977 |
5.7L / 350 / V8 |
Chevrolet |
Impala |
1978 |
5.7L / 350 / V8 |
Chevrolet |
Impala |
1979 |
5.7L / 350 / V8 |
Chevrolet |
Impala |
1980 |
5.7L / 350 / V8 |
Chevrolet |
Impala |
1981 |
5.7L / 350 / V8 |
Chevrolet |
Impala |
1982 |
5.7L / 350 / V8 |
Chevrolet |
Impala |
1983 |
5.7L / 350 / V8 |
Chevrolet |
Impala |
1984 |
5.7L / 350 / V8 |
Chevrolet |
Impala |
1985 |
5.7L / 350 / V8 |
Chevrolet |
Townsman |
1969 |
5.7L / 350 / V8 |
Chevrolet |
Townsman |
1970 |
5.7L / 350 / V8 |
Chevrolet |
Townsman |
1971 |
5.7L / 350 / V8 |
Chevrolet |
Townsman |
1972 |
5.7L / 350 / V8 |