B&M

B&M TH400 Shift Improver Kit

In stock
SKU: BMM20260
Automatic Transmission Shift Kit, Shift Improver, TH400 / TH375 / M40 1965-87, Kit

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Regular price $56.65
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Shift Improver Kit for 65-87 TH400 Transmission

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 and 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 Applications:

  • 1965-1969 Buick Skylark
  • 1965-1971 Oldsmobile 442
  • 1965-1975 Chevrolet Bel Air
  • 1965-1977 Pontiac Catalina
  • 1965-1977 Pontiac LeMans
  • 1965-1983 Cadillac Commercial Chassis
  • 1967-1974 GMC K25/K2500 Pickup
  • 1967-1977 Chevrolet Corvette
  • 1968-1980 Oldsmobile Delta 88
  • 1969-1972 Chevrolet Townsman
  • 1969-1990 Chevrolet Blazer
  • 1970-1974 Chevrolet G20 Van
  • 1970-1975 Chevrolet Monte Carlo
  • 1973-1975 Pontiac Grand Am
  • 1973-1977 Buick Century
  • 1975-1978 GMC C35
  • 1975-1978 GMC G25
  • 1975-1978 GMC G35
  • 1975-1978 GMC K25 Suburban
  • 1975-1990 Chevrolet P30
  • 1977-1978 GMC G15
  • 1977-1978 GMC K15 Suburban
  • 1979-1989 GMC P2500
  • 1979-1990 GMC C3500
  • 1987-1987 Chevrolet V20
  • 1987-1988 Chevrolet R20
  • 1988-1990 Chevrolet K2500
  • 1989-1989 Chevrolet R2500
  • 1989-1990 Chevrolet R2500 Suburban
  • 1965-1966 Cadillac Eldorado
  • 1965-1967 Buick Special
  • 1965-1972 Chevrolet Biscayne
  • 1965-1977 Pontiac Bonneville
  • 1965-1977 Pontiac Grand Prix
  • 1966-1974 GMC K15/K1500 Pickup
  • 1967-1970 Pontiac Executive
  • 1967-1986 Chevrolet C20 Suburban
  • 1971-1975 GMC Sprint
  • 1975-1975 Chevrolet Laguna
  • 1975-1978 GMC C25 Suburban
  • 1975-1978 GMC P25
  • 1975-1986 Chevrolet C10
  • 1975-1986 Chevrolet K20
  • 1975-1990 Chevrolet G20
  • 1977-1986 Chevrolet K5 Blazer
  • 1979-1986 GMC C2500 Suburban
  • 1979-1990 GMC K3500
  • 1987-1988 Chevrolet V20 Suburban
  • 1990-1990 Chevrolet V1500 Suburban
  • 1990-1990 GMC R1500 Suburban
  • 1967-1974 GMC C25/C2500 Pickup
  • 1967-1974 GMC K15/K1500 Suburban
  • 1967-1986 Chevrolet K20 Suburban
  • 1968-1975 Oldsmobile Vista Cruiser
  • 1969-1972 Chevrolet Kingswood
  • 1969-1975 Chevrolet Nova
  • 1969-1977 Pontiac Firebird
  • 1970-1974 GMC G35/G3500 Van
  • 1971-1975 Pontiac Grandville
  • 1975-1977 Pontiac Grand LeMans
  • 1975-1978 GMC C15
  • 1987-1990 Cadillac Brougham
  • 1989-1990 Chevrolet R3500
  • 1965-1966 Oldsmobile Starfire
  • 1965-1967 Chevrolet P10 Series
  • 1965-1967 Chevrolet P30 Series
  • 1965-1970 Pontiac Tempest
  • 1965-1972 Oldsmobile F85
  • 1965-1976 Cadillac Calais
  • 1965-1981 Cadillac DeVille
  • 1965-1984 Cadillac Fleetwood
  • 1967-1968 Oldsmobile Delmont 88
  • 1967-1984 Chevrolet K10 Suburban
  • 1968-1974 GMC C35/C3500 Pickup
  • 1970-1974 GMC K35/K3500 Pickup
  • 1970-1981 Buick Estate Wagon
  • 1975-1978 GMC C15 Suburban
  • 1975-1978 GMC C25
  • 1977-1978 GMC K35
  • 1978-1978 Buick Skyhawk
  • 1979-1980 GMC P1500
  • 1979-1990 GMC G2500
  • 1979-1990 GMC P3500
  • 1987-1987 Chevrolet V10
  • 1987-1988 Chevrolet V30
  • 1987-1990 GMC R2500 Suburban
  • 1987-1990 GMC V2500 Suburban
  • 1987-1990 GMC V3500
  • 1988-1990 Chevrolet C2500
  • 1965-1969 Buick Wildcat
  • 1965-1975 Chevrolet El Camino
  • 1965-1978 Buick Riviera
  • 1966-1969 Buick Sportwagon
  • 1966-1975 Chevrolet Caprice
  • 1973-1977 Buick Regal
  • 1975-1986 Chevrolet C20
  • 1976-1980 Chevrolet P10
  • 1977-1990 Chevrolet G10
  • 1979-1990 GMC C1500
  • 1979-1990 GMC C2500
  • 1987-1988 Chevrolet R30
  • 1987-1989 GMC R2500
  • 1988-1990 Chevrolet C1500
  • 1988-1990 Chevrolet K1500
  • 1989-1990 Chevrolet V2500 Suburban
  • 1990-1990 Chevrolet R1500 Suburban
  • 1990-1990 GMC V1500 Suburban
  • 1965-1966 Pontiac Star Chief
  • 1965-1967 Buick Gran Sport
  • 1965-1967 Chevrolet P20 Series
  • 1965-1972 Chevrolet Chevelle
  • 1965-1975 Chevrolet Impala
  • 1965-1980 Oldsmobile 98
  • 1973-1975 Chevrolet Camaro
  • 1975-1978 GMC P35
  • 1975-1989 Chevrolet P20
  • 1976-1978 GMC P15
  • 1977-1978 GMC K15
  • 1977-1986 Chevrolet K10
  • 1977-1986 Chevrolet K30
  • 1979-1984 GMC C1500 Suburban
  • 1979-1990 GMC K2500
  • 1987-1987 Chevrolet R10
  • 1987-1987 GMC V2500
  • 1988-1990 Chevrolet K3500
  • 1966-1973 Pontiac GTO
  • 1967-1984 Chevrolet C10 Suburban
  • 1968-1974 GMC C15/C1500 Suburban
  • 1968-1975 Oldsmobile Cutlass
  • 1970-1972 Buick GS
  • 1971-1980 Oldsmobile Custom Cruiser
  • 1975-1975 Oldsmobile Cutlass Salon
  • 1975-1976 Pontiac Grand Safari
  • 1975-1978 GMC K25
  • 1975-1986 Chevrolet C30
  • 1975-1990 Chevrolet G30
  • 1976-1978 Cadillac Seville
  • 1978-1978 Oldsmobile Toronado
  • 1979-1984 GMC K1500 Suburban
  • 1987-1987 GMC R1500
  • 1987-1987 GMC V1500
  • 1987-1990 GMC R3500
  • 1988-1990 Chevrolet C3500
  • 1965-1981 Buick Electra
  • 1965-1981 Buick LeSabre
  • 1966-1967 Chevrolet Chevy II
  • 1968-1974 GMC C15/C1500 Pickup
  • 1968-1974 GMC C25/C2500 Suburban
  • 1968-1974 GMC K25/K2500 Suburban
  • 1969-1972 Chevrolet Brookwood
  • 1970-1990 GMC Jimmy
  • 1971-1973 Buick Centurion
  • 1973-1975 Chevrolet Malibu
  • 1975-1975 Oldsmobile Cutlass Supreme
  • 1979-1986 GMC K2500 Suburban
  • 1979-1990 GMC G1500
  • 1979-1990 GMC G3500
  • 1979-1990 GMC K1500
  • 1987-1988 Chevrolet R20 Suburban
  • 1989-1990 Chevrolet V3500

    Fits 1965 to 1987 GM Turbo-Hydramatic 400, Turbo-Hydramatic 375 and 475 automatic transmissions

  • On Any Stock Automatic Transmission
  • Eliminates Soft/Sluggish Shift
  • Eliminates Shift Overlap
  • Eliminate Clutch and Band Wear
  • Improves Transmission Life
  • Transmission Removal Not Required
  • Product Description:

  • Automatic Transmission Shift Kit
  • Shift Improver
  • TH400 / TH375 / M40 1965-87
  • Kit
  • 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.