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Description
B&M Shift Improver Kit - GM TH400 Transmissions - 20260Overview: The B&M Shift Improver kits feature two options to recalibrating your 1965 1987 GM TH400, TH375 and TH475 automatic transmissions. First is the HEAVY DUTY set up, giving you firm positive shifts without loss of driver comfort for improved performance in all street vehicles. This is a great option for performance street driving or towing. The second is our STREET STRIP set up. Be warned, this will deliver firm positive shifts you will feel,
Overview:
The B&M® Shift Improver kits™ feature two options to recalibrating your 1965-1987 GM TH400, TH375 and TH475 automatic transmissions. First is the HEAVY DUTY set-up, giving you firm positive shifts without loss of driver comfort for improved performance in all street vehicles. This is a great option for performance street driving or towing. The second is our STREET/STRIP set-up. Be warned, this will deliver firm positive shifts you will feel, along with easily chirping the tires when shifting somewhat aggressively. This setting is recommend for high performance street/strip use, or for competitive events when you want the hardest, quickest shifts possible from a shift improver kit.
Features:
- Perfect for Towing or Street/Strip Use
- Eliminates Soft and Sluggish Shift
- Recalibrates Stock Transmissions
- Over 65 Years of B&M Quality
- Eliminates Shift Overlap
- Provides Crisp Shifts
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| 1965 - 1971 | Oldsmobile | 442 | ||
| 1965 | Oldsmobile | 98 | Base | |
| 1966 - 1980 | Oldsmobile | 98 | ||
| 1975 - 1986 | Chevrolet | K20 | ||
| 1967 - 1986 | Chevrolet | K20 Suburban | ||
| 1963 - 1972 | Chevrolet | Biscayne | ||
| 1969 - 1987 | Chevrolet | Blazer | ||
| 1968 - 1974 | GMC | C35/C3500 Pickup | ||
| 1969 - 1974 | GMC | G15/G1500 Van | ||
| 1969 - 1974 | GMC | G25/G2500 Van | ||
| 1970 - 1974 | GMC | G35/G3500 Van | ||
| 1970 - 1987 | GMC | Jimmy | ||
| 1966 - 1974 | GMC | K15/K1500 Pickup | ||
| 1967 - 1974 | GMC | K15/K1500 Suburban | ||
| 1975 - 1978 | GMC | K25 | ||
| 1979 - 1986 | GMC | K2500 | ||
| 1975 - 1978 | GMC | K25 Suburban | ||
| 1968 - 1980 | Oldsmobile | Delta 88 | ||
| 1965 - 1966 | Oldsmobile | Dynamic 88 | ||
| 1965 - 1972 | Oldsmobile | F85 | ||
| 1966 | Oldsmobile | F85 | Base | |
| 1966 | Oldsmobile | F85 | Deluxe | |
| 1966 | Oldsmobile | Jetstar 88 | ||
| 1973 - 1974 | Oldsmobile | Omega | ||
| 1975 - 1982 | Checker | Marathon | ||
| 1976 - 1977 | Pontiac | Grand LeMans | Base | |
| 1977 | Pontiac | Grand LeMans | Safari | |
| 1965 - 1977 | Pontiac | Grand Prix | ||
| 1975 - 1976 | Pontiac | Grand Safari | ||
| 1971 - 1975 | Pontiac | Grandville | ||
| 1965 - 1975 | Pontiac | LeMans | ||
| 1976 - 1977 | Pontiac | LeMans | Base | |
| 1976 - 1977 | Pontiac | LeMans | Sport | |
| 1977 | Pontiac | LeMans | Safari | |
| 1971 - 1980 | Oldsmobile | Custom Cruiser | ||
| 1973 | Buick | Apollo | ||
| 1971 - 1973 | Buick | Centurion | ||
| 1973 - 1977 | Buick | Century | ||
| 1964 - 1981 | Buick | Electra | ||
| 1965 - 1981 | Buick | LeSabre | ||
| 1970 - 1981 | Buick | Estate Wagon | ||
| 1973 - 1977 | Buick | Regal | ||
| 1965 - 1978 | Buick | Riviera | ||
| 1979 - 1986 | GMC | K2500 Suburban | ||
| 1977 - 1978 | GMC | K35 | ||
| 1979 - 1986 | GMC | K3500 | ||
| 1976 - 1978 | GMC | P15 | ||
| 1979 - 1980 | GMC | P1500 | ||
| 1975 - 1978 | GMC | P25 | ||
| 1979 - 1987 | GMC | P2500 | ||
| 1975 - 1978 | GMC | P35 | ||
| 1979 - 1987 | GMC | P3500 | ||
| 1987 | GMC | R1500 | ||
| 1987 | GMC | R2500 | ||
| 1987 | GMC | R2500 Suburban | ||
| 1987 | GMC | R3500 | ||
| 1971 - 1975 | GMC | Sprint | ||
| 1987 | GMC | V1500 | ||
| 1987 | GMC | V2500 | ||
| 1987 | GMC | V2500 Suburban | ||
| 1987 | GMC | V3500 | ||
| 1968 - 1975 | Oldsmobile | Cutlass | ||
| 1975 | Oldsmobile | Cutlass Salon | ||
| 1975 | Oldsmobile | Cutlass Supreme | ||
| 1978 | Oldsmobile | Toronado | ||
| 1968 - 1974 | GMC | C15/C1500 Suburban | ||
| 1967 - 1974 | GMC | C25/C2500 Pickup | ||
| 1967 - 1974 | GMC | C25/C2500 Suburban | ||
| 1969 - 1972 | Chevrolet | Brookwood | ||
| 1966 - 1974 | Chevrolet | C10 Pickup | ||
| 1967 - 1984 | Chevrolet | C10 Suburban | ||
| 1966 - 1974 | Chevrolet | C20 Pickup | ||
| 1967 - 1986 | Chevrolet | C20 Suburban | ||
| 1966 - 1974 | Chevrolet | C30 Pickup | ||
| 1967 - 1975 | Chevrolet | Camaro | ||
| 1973 | Chevrolet | Camaro | Base | |
| 1973 | Chevrolet | Camaro | RS | |
| 1973 | Chevrolet | Camaro | LT | |
| 1966 - 1975 | Chevrolet | Caprice | ||
| 1965 - 1972 | Chevrolet | Chevelle | Base | |
| 1965 | Chevrolet | Chevelle | Deluxe | |
| 1966 - 1971 | Chevrolet | Chevelle | ||
| 1966 - 1967 | Pontiac | Catalina | Safari | |
| 1968 - 1977 | Pontiac | Catalina | ||
| 1967 - 1968 | Pontiac | Firebird | Base | |
| 1967 | Pontiac | Firebird | HO | |
| 1967 - 1968 | Pontiac | Firebird | Sprint | |
| 1967 - 1968 | Pontiac | Firebird | 400 | |
| 1968 | Pontiac | Firebird | 350 | |
| 1969 - 1977 | Pontiac | Firebird | ||
| 1973 - 1975 | Pontiac | Grand Am | ||
| 1979 - 1986 | GMC | K1500 | ||
| 1977 - 1978 | GMC | K15 Suburban | ||
| 1979 - 1984 | GMC | K1500 Suburban | ||
| 1969 - 1974 | Chevrolet | K30 Pickup | ||
| 1969 | Chevrolet | Kingswood | Base | |
| 1972 | Chevrolet | Kingswood | ||
| 1973 - 1974 | Chevrolet | Malibu | Base | |
| 1970 - 1975 | Chevrolet | Monte Carlo | ||
| 1965 - 1967 | Buick | Gran Sport | ||
| 1970 - 1972 | Buick | GS | ||
| 1968 - 1974 | Buick | LeSabre | Base | |
| 1967 - 1974 | GMC | K25/K2500 Pickup | ||
| 1967 - 1974 | GMC | K25/K2500 Suburban | ||
| 1968 - 1974 | GMC | K35/K3500 Pickup | ||
| 1969 - 1974 | GMC | P15/P1500 Van | ||
| 1969 - 1974 | GMC | P25/P2500 Van | ||
| 1969 - 1973 | GMC | P35/P3500 Van | ||
| 1974 | GMC | P35/P3500 Van | Base | |
| 1969 - 1975 | Chevrolet | Nova | ||
| 1976 - 1980 | Chevrolet | P10 | ||
| 1975 - 1987 | Chevrolet | P20 | ||
| 1975 - 1987 | Chevrolet | P30 | ||
| 1987 | Chevrolet | R10 | ||
| 1987 | Chevrolet | R20 | ||
| 1987 | Chevrolet | R20 Suburban | ||
| 1987 | Chevrolet | R30 | ||
| 1987 | Chevrolet | V10 | ||
| 1987 | Chevrolet | V20 | ||
| 1987 | Chevrolet | V20 Suburban | ||
| 1987 | Chevrolet | V30 | ||
| 1975 - 1978 | GMC | C15 | ||
| 1979 - 1986 | GMC | C1500 | ||
| 1975 - 1978 | GMC | C15 Suburban | ||
| 1979 - 1984 | GMC | C1500 Suburban | ||
| 1975 - 1978 | GMC | C25 | ||
| 1979 - 1986 | GMC | C2500 | ||
| 1975 - 1978 | GMC | C25 Suburban | ||
| 1979 - 1986 | GMC | C2500 Suburban | ||
| 1966 - 1967 | Chevrolet | Chevy II | Base | |
| 1967 | Chevrolet | Chevy II | Nova SS | |
| 1967 - 1977 | Chevrolet | Corvette | ||
| 1965 - 1975 | Chevrolet | El Camino | ||
| 1969 - 1974 | Chevrolet | G10 Van | ||
| 1969 - 1974 | Chevrolet | G20 Van | ||
| 1966 - 1973 | Pontiac | GTO | ||
| 1965 - 1966 | Pontiac | Star Chief | ||
| 1971 - 1974 | Pontiac | Ventura | ||
| 1970 - 1974 | Chevrolet | G30 Van | ||
| 1965 - 1967 | Buick | Special | ||
| 1965 - 1976 | Cadillac | Calais | ||
| 1965 - 1981 | Cadillac | DeVille | ||
| 1965 - 1979 | Cadillac | Eldorado | ||
| 1965 - 1984 | Cadillac | Fleetwood | ||
| 1974 - 1983 | Cadillac | Fleetwood | Base | |
| 1974 | Cadillac | Fleetwood | 75 | |
| 1974 | Cadillac | Fleetwood | 60 Special | |
| 1963 - 1975 | Chevrolet | Bel Air | ||
| 1967 | Oldsmobile | Cutlass | Turnpike Cruiser | |
| 1967 - 1968 | Oldsmobile | Delmont 88 | ||
| 1977 - 1986 | Chevrolet | K30 | ||
| 1975 - 1986 | Chevrolet | C20 | ||
| 1975 - 1986 | Chevrolet | C30 | ||
| 1977 - 1987 | Chevrolet | G10 | ||
| 1975 - 1987 | Chevrolet | G20 | ||
| 1975 - 1987 | Chevrolet | G30 | ||
| 1963 - 1975 | Chevrolet | Impala | ||
| 1977 - 1986 | Chevrolet | K10 | ||
| 1983 | Chevrolet | K10 | Custom | |
| 1983 | Chevrolet | K10 | Scottsdale | |
| 1983 | Chevrolet | K10 | Silverado | |
| 1967 - 1984 | Chevrolet | K10 Suburban | ||
| 1978 | Buick | Skyhawk | ||
| 1965 - 1983 | Cadillac | Commercial Chassis | ||
| 1976 - 1978 | Cadillac | Eldorado | Base | |
| 1976 - 1978 | Cadillac | Eldorado | Cabriolet | |
| 1976 - 1978 | Cadillac | Eldorado | Biarritz | |
| 1976 | Cadillac | Eldorado | Bicentenial Edition | |
| 1980 - 1981 | Cadillac | Fleetwood | Brougham | |
| 1980 - 1981 | Cadillac | Fleetwood | Brougham d'Elegance | |
| 1980 - 1983 | Cadillac | Fleetwood | Formal | |
| 1987 | Cadillac | Brougham | ||
| 1976 - 1978 | Cadillac | Seville | ||
| 1977 - 1986 | Chevrolet | K5 Blazer | ||
| 1975 - 1986 | Chevrolet | C10 | ||
| 1965 - 1972 | Buick | Skylark | ||
| 1969 | Buick | Skylark | Base | |
| 1965 - 1970 | Buick | Wildcat | ||
| 1968 | Buick | Wildcat | Base | |
| 1975 - 1978 | GMC | C35 | ||
| 1979 - 1986 | GMC | C3500 | ||
| 1977 - 1978 | GMC | G15 | ||
| 1979 - 1987 | GMC | G1500 | ||
| 1975 - 1978 | GMC | G25 | ||
| 1979 - 1987 | GMC | G2500 | ||
| 1975 - 1978 | GMC | G35 | ||
| 1979 - 1986 | GMC | G3500 | ||
| 1981 - 1987 | GMC | G3500 | Rally | |
| 1981 - 1987 | GMC | G3500 | Rally STX | |
| 1981 - 1987 | GMC | G3500 | Vandura | |
| 1981 - 1987 | GMC | G3500 | Magnavan | |
| 1981 - 1987 | GMC | G3500 | Rally Camper Special | |
| 1981 - 1987 | GMC | G3500 | Vandura Special | |
| 1987 | GMC | G3500 | Rally Custom | |
| 1977 - 1978 | GMC | K15 | ||
| 1966 - 1974 | Chevrolet | K10 Pickup | ||
| 1966 - 1974 | Chevrolet | K20 Pickup | ||
| 1965 - 1969 | Pontiac | Tempest | ||
| 1966 - 1972 | Buick | Sportwagon | ||
| 1966 - 1968 | Pontiac | Tempest | Custom | |
| 1967 - 1970 | Pontiac | Executive | ||
| 1968 - 1970 | Pontiac | Tempest | Base | |
| 1968 | Pontiac | Tempest | Safari | |
| 1965 - 1966 | Oldsmobile | Starfire | ||
| 1968 - 1975 | Oldsmobile | Vista Cruiser | ||
| 1965 - 1977 | Pontiac | Bonneville | ||
| 1965 - 1967 | Pontiac | Catalina | Base | |
| 1966 | Pontiac | Catalina | 2+2 | |
| 1975 | Chevrolet | Laguna | ||
| 1975 | Chevrolet | Malibu | ||
| 1965 - 1967 | Chevrolet | P10 Series | ||
| 1969 - 1974 | Chevrolet | P10 Van | ||
| 1965 - 1967 | Chevrolet | P20 Series | ||
| 1969 - 1974 | Chevrolet | P20 Van | ||
| 1965 - 1967 | Chevrolet | P30 Series | ||
| 1969 - 1974 | Chevrolet | P30 Van | ||
| 1966 | Chevrolet | Suburban | ||
| 1969 - 1972 | Chevrolet | Townsman | ||
| 1974 | Chevrolet | Vega | ||
| 1968 - 1974 | GMC | C15/C1500 Pickup | ||
| 1975 | Buick | Century | Base | |
| 1975 | Buick | Century | Custom | |
| 1975 | Buick | Century | Luxus | |
| 1975 | Pontiac | Firebird | Trans Am | |
| 1975 | Pontiac | Grand LeMans |
Specs:
| Automotive Item Grade | High Performance |
|---|---|
| Brand | B&M |
| California Proposition 65 Chemical Name | Cadmium and cadmium compounds |
| California Proposition 65 Required | Yes |
| Emission Code | 5 |
| Gasket Included | Yes |
| Instructions Included | Yes |
| Manual Control | No |
| Product Type | Automatic Transmission Valve Body Kit |
| Warning | California Proposition 65 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 5
Believe the Reviews
Color: Cooling Blue Cover, Size: King (Pack of 2)
I purchased these pillows because we were in need of new pillows, I previously had allswell pillows which were from walmart and they were good to start but now they tragically became very sparse and it started to effect my sleep so I saw these after careful review on other pillows and reviews I came across these and I saw some reviews and videos and I ordered them.. first they are king size we ordered they are perfect for the bed, they are plump and soft, they are memory foam which has always worked out for me for support and kept it’s shape these are great it did have a little smell I guess from packaging but other than that they are a huge upgrade from what we had before! I’m excited because they are cooling too! for the price point can’t beat it and this is coming from someone who was about to spend money on a purple pillow this will be good for now definitely buy it.
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Reviewed in the United States on March 28, 2026
★★★★★ 3
Inconsistent
Color: Cooling Blue Cover, Size: Queen (Pack of 2)
Ive ordered two different batches of these pillows, the first was a 2 pack, the second batch was a 4 pack. The pillows that came in the 2 pack have a different quality to them. The memory foam feels thicker, takes long to depress and to spring back to form. It offers more resistance, a heavier odor (at the start), and was the pillow that I fell in love with. Things changed when I ordered the 4 pack a couple months later. There was an inconsistency between the foam in these two different batches. both sets of pillows are comfortable. The first batch being firmer means I had to remove more foam before it became comfortable but the 2nd batch being more springy, I was able to keep all the foam inside. I docked a couple stars because I’m not able to provide a consistent experience with these pillows across all three beds in my home.
If you need a pillow, order a set and be happy. If you want a bunch of memory foam pillows throughout your house, maybe look elsewhere as these may not all be identical.
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Reviewed in the United States on January 17, 2026
★★★★★ 5
Very cool and comfortable pillows. Great value.
Color: Cooling Blue Cover, Size: Queen (Pack of 2)
These pillows are everything described on the site. They do retain shape and don’t flatten out after sleeping all night. They are nice and clean looking and comfortable. The fit on my king size bed is perfect cause I prefer the size to king size. Haven’t had to wash them yet but I have had other pillows with the same material inside and the wash ability is great.
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Reviewed in the United States on May 17, 2026
★★★★★ 5
Great pillow
Color: Cooling Blue Cover, Size: Queen (Pack of 2)
The pillows feel great. Being able to remove portions of the interior allowed me and my wife to have a perfect fit. They do stay cool which seems to have helped with my restlessness.
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Reviewed in the United States on May 12, 2026
★★★★★ 5
It works! Quality pillow.
Size: Standard (1 Count), Color: Original White (Cooling)
This does actually provide a cooling effect, and it's very comfortable! The accompanying literature is helpful too. I believe this to be a quality pillow for the price.
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Reviewed in the United States on June 2, 2026