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B&M 20260

Shift Improver Kit 1965-1987 GM TH400/TH375/M40

B&M 20260
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130-20260

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B&M 20260 Shift Improver Kit 1965-1987 GM TH400/TH375/M40 $41.14
Shift Improver Kit
  • 1965-1987 GM TH400/TH375/M40
  • Includes Gaskets, Seals, Drill Bit and Fluid Separators

  • Specifications:

    Trans Year
    1965
    Trans Year
    1966
    Trans Year
    1967
    Trans Year
    1968
    Trans Year
    1969
    Trans Year
    1970
    Trans Year
    1971
    Trans Year
    1972
    Trans Year
    1973
    Trans Year
    1974
    Trans Year
    1975
    Trans Year
    1976
    Trans Year
    1977
    Trans Year
    1978
    Trans Year
    1979
    Trans Year
    1980
    Trans Year
    1981
    Trans Year
    1982
    Trans Year
    1983
    Trans Year
    1984
    Trans Year
    1985
    Trans Year
    1986
    Trans Year
    1987
    Trans Model
    GM- TH350 (Auto)3 Speed
    Trans Model
    GM- TH375 (Auto)3 Speed
    Trans Model
    GM- TH400 (Auto)3 Speed
    Gaskets Included
    Yes
    Automotive Item Grade
    High Performance
    Filter Included
    No
    Full Manual
    No
    Quantity
    Sold as a kit
    Manufacturer's Part Number:
    20260

    Performance Made Easy, Two Kits in One!

    B&M Shift Improver Kits are the easiest and most affordable way to gain automatic transmission performance results. B&M's kits modify an automatic transmission's shift timing in order to increase shift firmness and in-turn improve durability. These dual stage performance shift kits are application specific and contain your choice of Heavy Duty or Street/Strip configurations. Shift Improver Kits provide well appointed, crisp shifts delivering unmatched performance.

    Stage 1 - Heavy Duty:
    Firm, positive shifts without loss of passenger comfort for improved performance in all street vehicles. Recommended for normal passenger vehicles and tow vehicles.

    Stage 2 - Street/Strip:
    Provides positive shifts for high performance street use or competitive events. This configuration is for the enthusiast who wants hard, fast shifts.

    Features:
  • Recalibrate your transmission’s shift timing.
  • Select the configuration that best suits your application.
  • Provides well appointed, crisp shifts.
  • Eliminates excessive shift overlap.
  • Less wear and tear on your transmission’s clutches and bands.

  • Does B&M 20260 fit your vehicle?

    Narrow Results
    Filter By
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    Aspiration

    1969-1971 CHEVROLET C10 PICKUP

    • CC: 5736
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1983-1984 CHEVROLET K20 SUBURBAN

    • EngineType: ALL
    • SubModel: ALL

    1972 GMC C1500 PICKUP

    • CC: 6588
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1979-1982 GMC G35/G3500 VAN

    • EngineType: ALL
    • SubModel: RALLY

    1970-1974 CADILLAC FLEETWOOD

    • CC: 7735
    • Liter: 7.7
    • SubModel: 75
    • CUI: 472
    • EngineType: V8 ( 7.7 L / 472 )

    1979-1982 CHEVROLET G10 VAN

    • EngineType: ALL
    • SubModel: CHEVY VAN

    1976 PONTIAC LEMANS

    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1975 CHEVROLET NOVA

    • Liter: 5.7
    • SubModel: POLICE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1973-1974 CHEVROLET K10 PICKUP

    • CC: 4098
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1972 CHEVROLET KINGSWOOD

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: J
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1974 GMC C1500 PICKUP

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1982-1983 CADILLAC COMMERCIAL CHASSIS

    • EngineType: ALL
    • SubModel: ALL

    1974 PONTIAC BONNEVILLE

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: B
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1971 CHEVROLET G20 VAN

    • CC: 5736
    • Liter: 5.7
    • Aspiration: N
    • SubModel: SPORTVAN
    • Engine Vin: E
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1974 GMC C25/C2500 SUBURBAN

    • CC: 7439
    • Liter: 7.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: L
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1977 PONTIAC GRAND PRIX

    • Liter: 4.9
    • SubModel: BASE
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    1974 GMC C15/C1500 SUBURBAN

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977-1978 GMC K15 SUBURBAN

    • Liter: 4.1
    • SubModel: SIERRA GRANDE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1965-1966 BUICK SKYLARK

    • CC: 6555
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1974 PONTIAC CATALINA

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: K
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1971 CHEVROLET CHEVELLE

    • CC: 5736
    • Liter: 5.7
    • SubModel: CONCOURS ESTATE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1972-1974 GMC K1500 PICKUP

    • CC: 4098
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1971 GMC G35/G3500 VAN

    • Liter: 5.7
    • Aspiration: N
    • SubModel: VANDURA
    • Engine Vin: B
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1967 PONTIAC EXECUTIVE

    • EngineType: ALL
    • SubModel: ALL

    1968-1971 OLDSMOBILE F85

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1973 GMC C25/C2500 SUBURBAN

    • CC: 5736
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1973-1974 CHEVROLET BEL AIR

    • CC: 7441
    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1967 CHEVROLET CAMARO

    • EngineType: ALL
    • SubModel: RS

    1973 CHEVROLET MALIBU

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1983-1984 CHEVROLET G10 VAN

    • EngineType: ALL
    • SubModel: ALL

    1966 PONTIAC GTO

    • CC: 6376
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 389
    • EngineType: V8 ( 6.4 L / 389 )

    1971 PONTIAC VENTURA

    • CC: 5733
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1970-1971 CHEVROLET C30 PICKUP

    • CC: 4097
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1969 CHEVROLET C10 SUBURBAN

    • CC: 5358
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 327
    • EngineType: V8 ( 5.3 L / 327 )

    1972 CHEVROLET BEL AIR

    • CC: 7441
    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1979-1986 GMC K3500 PICKUP

    • EngineType: ALL
    • SubModel: ALL

    1971 PONTIAC LEMANS

    • CC: 5733
    • Liter: 5.7
    • SubModel: T37
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1976-1977 PONTIAC LEMANS

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1973-1974 CHEVROLET K10 SUBURBAN

    • CC: 7439
    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1981 CHEVROLET BLAZER K5

    • EngineType: ALL
    • SubModel: DELUXE

    1973 PONTIAC LEMANS

    • CC: 4098
    • Liter: 4.1
    • SubModel: SAFARI
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1975-1981 GMC P25/P2500 VAN

    • EngineType: ALL
    • SubModel: ALL

    1975 CHEVROLET MONTE CARLO

    • Liter: 6.6
    • SubModel: S
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1973 CHEVROLET CAMARO

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: RS
    • Engine Vin: H
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1968 GMC C15/C1500 SUBURBAN

    • CC: 6489
    • Liter: 6.5
    • SubModel: BASE
    • CUI: 396
    • EngineType: V8 ( 6.5 L / 396 )

    1967 PONTIAC CATALINA

    • EngineType: ALL
    • SubModel: SAFARI

    1967 GMC K15/K1500 SUBURBAN

    • CC: 4097
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1967 CHEVROLET CHEVELLE

    • CC: 5358
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 327
    • EngineType: V8 ( 5.3 L / 327 )

    1965-1966 CHEVROLET EL CAMINO

    • CC: 4638
    • Liter: 4.6
    • SubModel: BASE
    • CUI: 283
    • EngineType: V8 ( 4.6 L / 283 )

    1978-1981 BUICK ELECTRA

    • EngineType: ALL
    • SubModel: ALL

    1968 OLDSMOBILE VISTA CRUISER

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1972 CHEVROLET K10 PICKUP

    • CC: 4097
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1974 CHEVROLET C10 PICKUP

    • CC: 4097
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1974 GMC K35/K3500 PICKUP

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1968 CHEVROLET EL CAMINO

    • Liter: 5.4
    • SubModel: CUSTOM
    • CUI: 327
    • EngineType: V8 ( 5.4 L / 327 )

    1984 CADILLAC FLEETWOOD

    • EngineType: ALL
    • SubModel: ALL

    1976-1977 BUICK RIVIERA

    • EngineType: ALL
    • SubModel: ALL

    1983-1984 CHEVROLET K10 SUBURBAN

    • EngineType: ALL
    • SubModel: ALL

    1977 PONTIAC GRAND PRIX

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1976-1977 CADILLAC FLEETWOOD

    • EngineType: ALL
    • SubModel: BROUGHAM

    1967 GMC K1500 PICKUP

    • CC: 3769
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 230
    • EngineType: L6 ( 3.8 L / 230 )

    1969 CHEVROLET C30 PICKUP

    • CC: 4097
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1965-1966 CADILLAC DEVILLE

    • EngineType: ALL
    • SubModel: ALL

    1974 GMC C25/C2500 SUBURBAN

    • CC: 7439
    • Liter: 7.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: Z
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1973 PONTIAC VENTURA

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1981 CHEVROLET C10 PICKUP

    • CC: 5031
    • Liter: 5.0
    • SubModel: CUSTOM
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1985 CHEVROLET C10 PICKUP

    • EngineType: ALL
    • SubModel: SCOTTSDALE

    1973-1974 GMC G35/G3500 VAN

    • Liter: 4.1
    • SubModel: VANDURA
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1972 PONTIAC LEMANS

    • CC: 6556
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1981 CHEVROLET C10 PICKUP

    • Liter: 5.7
    • SubModel: SILVERADO
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1973 CHEVROLET MONTE CARLO

    • CC: 7441
    • Liter: 7.4
    • SubModel: S
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1975 OLDSMOBILE DELTA 88

    • EngineType: ALL
    • SubModel: ROYALE

    1987 CHEVROLET R10 PICKUP

    • EngineType: ALL
    • SubModel: ALL

    1965-1967 PONTIAC TEMPEST

    • EngineType: ALL
    • SubModel: CUSTOM

    1965-1966 CHEVROLET CHEVELLE

    • CC: 3180
    • Liter: 3.2
    • SubModel: BASE
    • CUI: 194
    • EngineType: L6 ( 3.2 L / 194 )

    1965-1969 CHEVROLET IMPALA

    • CC: 4098
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1973 CHEVROLET BLAZER

    • CC: 7439
    • Liter: 7.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: Z
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1979-1982 GMC G35/G3500 VAN

    • EngineType: ALL
    • SubModel: VANDURA SPECIAL

    1970-1971 CHEVROLET K20 PICKUP

    • CC: 4097
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1977-1986 GMC K1500 PICKUP

    • EngineType: ALL
    • SubModel: ALL

    1974 PONTIAC GRAND PRIX

    • CC: 6556
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1981 CHEVROLET C20 SUBURBAN

    • EngineType: ALL
    • SubModel: DELUXE

    1976 BUICK ELECTRA

    • Liter: 5.7
    • SubModel: 225
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1987 CHEVROLET R20 PICKUP

    • EngineType: ALL
    • SubModel: ALL

    1972-1974 GMC C25/C2500 SUBURBAN

    • Liter: 4.8
    • SubModel: BASE
    • CUI: 292
    • EngineType: L6 ( 4.8 L / 292 )

    1985 GMC G25/G2500 VAN

    • EngineType: ALL
    • SubModel: ALL

    1970-1971 PONTIAC BONNEVILLE

    • CC: 6555
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1973-1974 BUICK ESTATE WAGON

    • CC: 7456
    • Liter: 7.5
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: V
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1969 BUICK SKYLARK

    • CC: 4098
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1971 CHEVROLET CAMARO

    • CC: 5031
    • Liter: 5.0
    • Aspiration: N
    • SubModel: RS
    • Engine Vin: CA
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1968 CHEVROLET K20 SUBURBAN

    • CC: 5031
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1972-1973 OLDSMOBILE VISTA CRUISER

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1974 CHEVROLET BLAZER

    • CC: 7439
    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1983-1984 GMC G35/G3500 VAN

    • EngineType: ALL
    • SubModel: ALL

    1972 CHEVROLET C10 PICKUP

    • CC: 5031
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1973-1974 CHEVROLET MALIBU

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: T
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1970 CHEVROLET CHEVELLE

    • CC: 6588
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1973-1974 CHEVROLET MALIBU

    • CC: 4098
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1972 CHEVROLET C10 PICKUP

    • CC: 4098
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1970 GMC JIMMY

    • CC: 4801
    • Liter: 4.8
    • SubModel: BASE
    • CUI: 292
    • EngineType: L6 ( 4.8 L / 292 )
    20260 - B&M Automatic Transmission Shift Improver Kits is rated 5.0 out of 5 by 1.
    Rated 5 out of 5 by from Great products and fast shipping.................. We opted to do business with Jegs because of their commitment to quality and fast shipping. We have ordered several parts over the past couple of years and have been completely satisfied with their products. I am sure the B&M shift kit for a GTO restoration will not disappoint once we fire up the motor.
    Date published: 2016-08-18
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