B&M Shift Improver Kit 1965-1987 GM TH400/TH375/M40
130-20260

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GM
B&M Shift Improver Kit - GM TH400 Transmissions.
Specifications:
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:
Stage 2 - Street/Strip:
Performance Made Easy, Two Kits in One!
Firm, positive shifts without loss of passenger comfort for improved performance in all street vehicles. Recommended for normal passenger vehicles and tow vehicles.
Provides positive shifts for high performance street use or competitive events. This configuration is for the enthusiast who wants hard, fast shifts.
Does B&M 20260 fit your vehicle?
1971 OLDSMOBILE DELTA 88
- Liter: 7.5
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Incl. Gaskets/Seals/Drill Bit/Fluid Separators
- CUI: 455
- Engine Type: V8 ( 7.5L / 455 )
- Engine Vin: -
1979 CHEVROLET K30
- Liter: 4.8
- SubModel: SILVERADO
- Aspiration: NATURALLY ASPIRATED
- CUI: 292
- Engine Type: L6 ( 4.8L / 292 )
- Engine Vin: T
1974 GMC G25/G2500 VAN
- Liter: 4.1
- SubModel: VANDURA
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Incl. Gaskets/Seals/Drill Bit/Fluid Separators
- CUI: 250
- Engine Type: L6 ( 4.1L / 250 )
- Engine Vin: Q
1975 CHEVROLET G20
- Liter: 6.6
- SubModel: BEAUVILLE
- Aspiration: NATURALLY ASPIRATED
- CUI: 400
- Engine Type: V8 ( 6.6L / 400 )
- Engine Vin: M
1983 CHEVROLET C30
- Liter: 4.8
- SubModel: SCOTTSDALE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Incl. Gaskets/Seals/Drill Bit/Fluid Separators
- CUI: 292
- Engine Type: L6 ( 4.8L / 292 )
- Engine Vin: T
1978 GMC C35
- Liter: 4.1
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- CUI: 250
- Engine Type: L6 ( 4.1L / 250 )
- Engine Vin: D
1972 OLDSMOBILE CUTLASS
- Liter: 5.7
- SubModel: CRUISER
- Aspiration: NATURALLY ASPIRATED
- CUI: 350
- Engine Type: V8 ( 5.7L / 350 )
- Engine Vin: H
1986 CHEVROLET K10
- Liter: 5
- SubModel: SILVERADO
- Aspiration: NATURALLY ASPIRATED
- CUI: 305
- Engine Type: V8 ( 5L / 305 )
- Engine Vin: H
1970 GMC K25/K2500 SUBURBAN
- Liter: 4.8
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- CUI: 292
- Engine Type: L6 ( 4.8L / 292 )
- Engine Vin: S
1971 BUICK SKYLARK
- Liter: 5.7
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Incl. Gaskets/Seals/Drill Bit/Fluid Separators
- CUI: 350
- Engine Type: V8 ( 5.7L / 350 )
- Engine Vin: -
1970 GMC P35/P3500 VAN
- Liter: 5
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Incl. Gaskets/Seals/Drill Bit/Fluid Separators
- CUI: 307
- Engine Type: V8 ( 5L / 307 )
- Engine Vin: A
1981 GMC JIMMY
- Liter: 5
- SubModel: SIERRA GRANDE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Incl. Gaskets/Seals/Drill Bit/Fluid Separators
- CUI: 305
- Engine Type: V8 ( 5L / 305 )
- Engine Vin: G
Motor Vehicles
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
Tools:
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Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.