Description
1965-1987 GM TH400/375 Automatic Transmissions. 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.
- Improves Transmission Life
- Optimum Performance
- Firmer Shifts
- Recalibrate’s GM TH400 Automatic Transmissions
- Full Manual Control on Most Transmissions
- Over 65 Years of B&M Quality
Information:
Fits 1965-1987 GM Turbo-Hydramatic 400, Turbo-Hydramatic 375 automatic transmissions.
Application Summary:
| Year | Make/Model |
|---|---|
| 1973-1975 | Buick Apollo |
| 1973 | Buick Centurion |
| 1973-1987 | Buick Century |
| 1965-1976 | Buick Electra |
| 1978-1982 | Buick Electra |
| 1984-1987 | Buick Electra |
| 1970 | Buick Estate Wagon |
| 1972-1974 | Buick Estate Wagon |
| 1977-1983 | Buick Estate Wagon |
| 1965-1967 | Buick Gran Sport |
| 1970-1972 | Buick GS |
| 1968-1969 | Buick GS 350 |
| 1968-1969 | Buick GS 400 |
| 1970-1972 | Buick GS 455 |
| 1965-1982 | Buick LeSabre |
| 1984-1987 | Buick LeSabre |
| 1973-1987 | Buick Regal |
| 1965-1987 | Buick Riviera |
| 1975-1980 | Buick Skyhawk |
| 1965-1972 | Buick Skylark |
| 1975-1987 | Buick Skylark |
| 1986-1987 | Buick Somerset |
| 1985 | Buick Somerset Regal |
| 1965-1969 | Buick Special |
| 1965-1972 | Buick Sportwagon |
| 1965-1970 | Buick Wildcat |
| 1987 | Cadillac Allante |
| 1965-1976 | Cadillac Calais |
| 1985-1987 | Cadillac Cimarron |
| 1965-1974 | Cadillac Commercial Chassis |
| 1976-1977 | Cadillac Commercial Chassis |
| 1980-1987 | Cadillac Commercial Chassis |
| 1965-1986 | Cadillac DeVille |
| 1965-1986 | Cadillac Eldorado |
| 1965-1974 | Cadillac Fleetwood |
| 1979-1986 | Cadillac Fleetwood |
| 1976-1987 | Cadillac Seville |
| 1985-1987 | Chevrolet Astro |
| 1965-1975 | Chevrolet Bel Air |
| 1965-1972 | Chevrolet Biscayne |
| 1969-1974 | Chevrolet Blazer |
| 1987 | Chevrolet Blazer |
| 1969-1972 | Chevrolet Brookwood |
| 1975-1986 | Chevrolet C10 |
| 1965-1967 | Chevrolet C10 Panel |
| 1965-1974 | Chevrolet C10 Pickup |
| 1967 | Chevrolet C10 Suburban |
| 1969-1984 | Chevrolet C10 Suburban |
| 1975-1986 | Chevrolet C20 |
| 1967 | Chevrolet C20 Panel |
| 1965 | Chevrolet C20 Pickup |
| 1967-1974 | Chevrolet C20 Pickup |
| 1967 | Chevrolet C20 Suburban |
| 1969-1986 | Chevrolet C20 Suburban |
| 1975-1986 | Chevrolet C30 |
| 1965-1966 | Chevrolet C30 Panel |
| 1965-1974 | Chevrolet C30 Pickup |
| 1967-1987 | Chevrolet Camaro |
| 1966-1987 | Chevrolet Caprice |
| 1985-1986 | Chevrolet Cavalier |
| 1982-1987 | Chevrolet Celebrity |
| 1965-1977 | Chevrolet Chevelle |
| 1965-1968 | Chevrolet Chevy II |
| 1980-1983 | Chevrolet Citation |
| 1984-1985 | Chevrolet Citation II |
| 1987 | Chevrolet Corsica |
| 1965-1982 | Chevrolet Corvette |
| 1984-1987 | Chevrolet Corvette |
| 1965-1987 | Chevrolet El Camino |
| 1969-1970 | Chevrolet Estate |
| 1975-1987 | Chevrolet G10 |
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