The B&M® vacuum modulator is fully adjustable and allows you to fine-tune your shift points and shift feel. This is done by turning the adjustment screw inside of the vacuum line connection for more or less diaphragm preload, thus raising or lowering part throttle shift points and line pressures. For GM TH350 and TH400 automatic transmissions.
Features:
- Allows you to Tailor Shift Points
- New O-ring Helps Stop Leaks
- Fully Adjustable
- B&M Quality
For GM TH350 and TH400 automatic transmissions. A minimum of 12" Hg engine vacuum is required for proper operation.
Installation Notes:
For GM TH350 and TH400 automatic transmissions. A minimum of 12" Hg engine vacuum is required for proper operation.
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.
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 |
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 |
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 |
Impala |
1965 |
5.4L / 327 / V8 |
Chevrolet |
Impala |
1966 |
5.4L / 327 / V8 |
Chevrolet |
Impala |
1968 |
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 |
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 |