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B&M Adjustable Modulator, GM TH350/TH400 Automatic Transmissions 20234

B&M Adjustable Modulator, GM TH350/TH400 Automatic Transmissions 20234
B&M Adjustable Modulator, GM TH350/TH400 Automatic Transmissions 20234B&M Adjustable Modulator, GM TH350/TH400 Automatic Transmissions 20234B&M Adjustable Modulator, GM TH350/TH400 Automatic Transmissions 20234B&M Adjustable Modulator, GM TH350/TH400 Automatic Transmissions 20234B&M Adjustable Modulator, GM TH350/TH400 Automatic Transmissions 20234B&M Adjustable Modulator, GM TH350/TH400 Automatic Transmissions 20234B&M Adjustable Modulator, GM TH350/TH400 Automatic Transmissions 20234
$65.99 ea
NEWOut of stock with HOLLEY PERFORMANCE PRODUCTS as of 05/06/2024
Model: 3998134
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
STANDARD
DELIVERY
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.

Videos:

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

Specifications:

California Proposition 65 Chemical Name Cadmium and cadmium compounds
California Proposition 65 Required Yes
Emission Code 5
Finish Gold Iridited
Instructions Included Yes
Material Steel
Part Type Automatic Transmission Vacuum Modulator
Product Type Automatic Transmission Modulator Valve
Proposition 65 www.P65Warnings.ca.gov
Warranty Time 12 Months

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B&M Adjustable Modulator, GM TH350/TH400 Automatic Transmissions 20234:

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