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- USA
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Ships within 48 hours · Estimated delivery Jul 12 - Jul 17
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For Your Every Summer RSVP, with Code: SUMMER15
Description
B&M Transpak - GM TH400/375 Transmissions - 20228Overview: 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
Overview:
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.
Features:
- Recalibrate's GM TH400 Automatic Transmissions
- Full Manual Control on Most Transmissions
- Over 65 Years of B&M Quality
- Improves Transmission Life
- Optimum Performance
- Firmer Shifts
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| 1970 - 1974 | Chevrolet | G30 Van | ||
| 1969 - 1975 | Chevrolet | Nova | ||
| 1965 - 1967 | Buick | Special | ||
| 1965 - 1983 | Cadillac | Commercial Chassis | ||
| 1965 - 1969 | Pontiac | Tempest | ||
| 1966 - 1972 | Buick | Sportwagon | ||
| 1966 - 1968 | Pontiac | Tempest | Custom | |
| 1967 - 1984 | Chevrolet | C10 Suburban | ||
| 1967 - 1986 | Chevrolet | C20 Suburban | ||
| 1967 - 1984 | Chevrolet | K10 Suburban | ||
| 1967 - 1986 | Chevrolet | K20 Suburban | ||
| 1967 - 1974 | GMC | K15/K1500 Suburban | ||
| 1967 - 1970 | Pontiac | Executive | ||
| 1968 - 1970 | Pontiac | Tempest | Base | |
| 1968 | Pontiac | Tempest | Safari | |
| 1970 - 1974 | GMC | G35/G3500 Van | ||
| 1967 - 1974 | GMC | K25/K2500 Suburban | ||
| 1967 - 1974 | GMC | C25/C2500 Suburban | ||
| 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 | ||
| 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 | ||
| 1966 - 1974 | Chevrolet | K10 Pickup | ||
| 1966 - 1974 | Chevrolet | K20 Pickup | ||
| 1969 - 1974 | Chevrolet | K30 Pickup | ||
| 1969 | Chevrolet | Kingswood | Base | |
| 1971 | Chevrolet | Kingswood | Estate | |
| 1972 | Chevrolet | Kingswood | ||
| 1973 - 1974 | Chevrolet | Malibu | Base | |
| 1970 - 1975 | Chevrolet | Monte Carlo | ||
| 1965 - 1984 | Cadillac | Fleetwood | ||
| 1969 - 1973 | GMC | P35/P3500 Van | ||
| 1974 | GMC | P35/P3500 Van | Base | |
| 1971 - 1975 | GMC | Sprint | ||
| 1965 - 1971 | Oldsmobile | 442 | ||
| 1965 | Oldsmobile | 98 | Base | |
| 1966 - 1980 | Oldsmobile | 98 | ||
| 1968 - 1974 | GMC | C35/C3500 Pickup | ||
| 1969 - 1974 | GMC | G15/G1500 Van | ||
| 1969 - 1974 | GMC | G25/G2500 Van | ||
| 1970 - 1987 | GMC | Jimmy | ||
| 1976 - 1978 | Cadillac | Eldorado | Cabriolet | |
| 1976 - 1978 | Cadillac | Eldorado | Biarritz | |
| 1976 | Cadillac | Eldorado | Bicentenial Edition | |
| 1976 - 1978 | Cadillac | Eldorado | Base | |
| 1965 - 1979 | Cadillac | Eldorado | ||
| 1974 - 1983 | Cadillac | Fleetwood | Base | |
| 1980 - 1981 | Cadillac | Fleetwood | Brougham | |
| 1980 - 1981 | Cadillac | Fleetwood | Brougham d'Elegance | |
| 1980 - 1983 | Cadillac | Fleetwood | Formal | |
| 1987 | Cadillac | Brougham | ||
| 1975 - 1982 | Checker | Marathon | ||
| 1975 | Buick | Century | Base | |
| 1975 | Buick | Century | Custom | |
| 1975 | Buick | Century | Luxus | |
| 1973 - 1977 | Buick | Century | ||
| 1965 - 1981 | Buick | Electra | ||
| 1970 - 1981 | Buick | Estate Wagon | ||
| 1965 - 1981 | Buick | LeSabre | ||
| 1973 - 1977 | Buick | Regal | ||
| 1965 - 1978 | Buick | Riviera | ||
| 1978 | Buick | Skyhawk | ||
| 1965 - 1976 | Cadillac | Calais | ||
| 1965 - 1981 | Cadillac | DeVille | ||
| 1970 - 1972 | Buick | GS | ||
| 1968 - 1974 | Buick | LeSabre | Base | |
| 1966 - 1974 | Chevrolet | C20 Pickup | ||
| 1966 - 1974 | Chevrolet | C30 Pickup | ||
| 1967 - 1975 | Chevrolet | Camaro | ||
| 1975 - 1987 | Chevrolet | P20 | ||
| 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 | ||
| 1972 | Chevrolet | Chevelle | SS | |
| 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 | ||
| 1965 - 1975 | Chevrolet | Impala | ||
| 1966 - 1973 | Pontiac | GTO | ||
| 1965 - 1975 | Pontiac | LeMans | ||
| 1965 - 1966 | Pontiac | Star Chief | ||
| 1971 - 1974 | Pontiac | Ventura | ||
| 1975 - 1976 | Pontiac | Grand Safari | ||
| 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 | ||
| 1987 | GMC | V1500 | ||
| 1987 | GMC | V2500 | ||
| 1987 | GMC | V2500 Suburban | ||
| 1987 | GMC | V3500 | ||
| 1971 - 1980 | Oldsmobile | Custom Cruiser | ||
| 1968 - 1975 | Oldsmobile | Cutlass | ||
| 1975 | Oldsmobile | Cutlass Salon | ||
| 1975 | Oldsmobile | Cutlass Supreme | ||
| 1968 - 1980 | Oldsmobile | Delta 88 | ||
| 1978 | Oldsmobile | Toronado | ||
| 1968 - 1975 | Oldsmobile | Vista Cruiser | ||
| 1965 - 1977 | Pontiac | Bonneville | ||
| 1968 - 1977 | Pontiac | Catalina | ||
| 1975 | Pontiac | Firebird | Trans Am | |
| 1969 - 1977 | Pontiac | Firebird | ||
| 1973 - 1975 | Pontiac | Grand Am | ||
| 1975 | Pontiac | Grand LeMans | ||
| 1976 - 1977 | Pontiac | Grand LeMans | Base | |
| 1977 | Pontiac | Grand LeMans | Safari | |
| 1965 - 1977 | Pontiac | Grand Prix | ||
| 1971 - 1975 | Pontiac | Grandville | ||
| 1976 - 1977 | Pontiac | LeMans | Base | |
| 1976 - 1977 | Pontiac | LeMans | Sport | |
| 1977 | Pontiac | LeMans | Safari | |
| 1973 | Buick | Apollo | ||
| 1971 - 1973 | Buick | Centurion | ||
| 1965 - 1967 | Buick | Gran Sport | ||
| 1965 - 1972 | Buick | Skylark | ||
| 1968 - 1974 | GMC | C15/C1500 Pickup | ||
| 1968 - 1974 | GMC | C15/C1500 Suburban | ||
| 1967 - 1974 | GMC | C25/C2500 Pickup | ||
| 1965 - 1967 | Pontiac | Catalina | Base | |
| 1966 | Pontiac | Catalina | 2+2 | |
| 1966 - 1967 | Pontiac | Catalina | Safari | |
| 1975 - 1987 | Chevrolet | P30 | ||
| 1987 | Chevrolet | R10 | ||
| 1988 | Chevrolet | R20 | Custom Deluxe | |
| 1987 | Chevrolet | R20 | ||
| 1987 | Chevrolet | R20 Suburban | ||
| 1987 | Chevrolet | R30 | ||
| 1987 | Chevrolet | V10 | ||
| 1987 | Chevrolet | V20 | ||
| 1987 | Chevrolet | V20 Suburban | ||
| 1987 | Chevrolet | V30 | ||
| 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 | ||
| 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 - 1988 | GMC | G3500 | Rally Custom | |
| 1977 - 1978 | GMC | K15 | ||
| 1979 - 1986 | GMC | K1500 | ||
| 1977 - 1978 | GMC | K15 Suburban | ||
| 1979 - 1984 | GMC | K1500 Suburban | ||
| 1975 - 1978 | GMC | K25 | ||
| 1979 - 1986 | GMC | K2500 | ||
| 1975 - 1978 | GMC | K25 Suburban | ||
| 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 | ||
| 1966 | Chevrolet | Suburban | ||
| 1969 - 1972 | Chevrolet | Townsman | ||
| 1974 | Chevrolet | Vega | ||
| 1969 - 1987 | Chevrolet | Blazer | ||
| 1969 - 1972 | Chevrolet | Brookwood | ||
| 1966 - 1974 | Chevrolet | C10 Pickup | ||
| 1967 | Oldsmobile | Cutlass | Turnpike Cruiser | |
| 1967 - 1968 | Oldsmobile | Delmont 88 | ||
| 1976 - 1978 | Cadillac | Seville | ||
| 1965 - 1975 | Chevrolet | Bel Air | ||
| 1977 - 1986 | Chevrolet | K5 Blazer | ||
| 1975 - 1986 | Chevrolet | C10 | ||
| 1975 - 1986 | Chevrolet | C20 | ||
| 1975 - 1986 | Chevrolet | C30 | ||
| 1974 | Cadillac | Fleetwood | 75 | |
| 1974 | Cadillac | Fleetwood | 60 Special | |
| 1965 - 1972 | Chevrolet | Biscayne | ||
| 1966 - 1974 | GMC | K15/K1500 Pickup | ||
| 1967 - 1974 | GMC | K25/K2500 Pickup | ||
| 1968 - 1974 | GMC | K35/K3500 Pickup | ||
| 1969 - 1974 | GMC | P15/P1500 Van | ||
| 1969 - 1974 | GMC | P25/P2500 Van | ||
| 1977 - 1987 | Chevrolet | G10 | ||
| 1975 - 1987 | Chevrolet | G20 | ||
| 1975 - 1987 | Chevrolet | G30 | ||
| 1977 - 1986 | Chevrolet | K10 | ||
| 1983 | Chevrolet | K10 | Custom | |
| 1983 | Chevrolet | K10 | Scottsdale | |
| 1983 | Chevrolet | K10 | Silverado | |
| 1975 - 1986 | Chevrolet | K20 | ||
| 1977 - 1986 | Chevrolet | K30 | ||
| 1975 | Chevrolet | Laguna | ||
| 1975 | Chevrolet | Malibu | ||
| 1976 - 1980 | Chevrolet | P10 | ||
| 1967 - 1968 | Pontiac | Firebird | Base | |
| 1967 | Pontiac | Firebird | HO | |
| 1967 - 1968 | Pontiac | Firebird | Sprint | |
| 1967 - 1968 | Pontiac | Firebird | 400 | |
| 1968 | Pontiac | Firebird | 350 | |
| 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 | ||
| 1965 - 1966 | Oldsmobile | Starfire | ||
| 1969 | Buick | Skylark | Base | |
| 1965 - 1970 | Buick | Wildcat | ||
| 1968 | Buick | Wildcat | Base |
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 | Partial |
| 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
4.5 ★★★★★
Based on 547 reviews
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Product Reviews
★★★★★ 5
Perfect for School
Color: Blue/Silver-Tone/Digital
Purchased as a for a middle schooler who isn’t allowed any electronics at school during school hours. Helps keep her on task without breaking the smart device policies. Perfect “old school” way to work.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 18, 2026
★★★★★ 3
hard to read display, no manual included.
Color: Black/Black/Digital
I haven't decided yet whether or not I will keep the watch. Problem is there is no instruction manual attached and you cannot find one online. However if you call Timex support they will email you the manual if you give them the model number which is included in Amazon's product description. However even with the manual watch is very hard to set. It lacks some functions normally Timex has like time can only be set up there is no down button. And most importantly display is minuscule. So it is really hard to read to set. Watch is a ladies watch. It is small and I like it a lot. But buttons are hard to operate and it is hard to read.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2025
★★★★★ 5
Great item
Color: Black/Silver-Tone/Digital
Great item
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 5, 2026
★★★★★ 5
My boyfriend loved it!
Color: Ingram Black
I have total and complete confidence that you will be 100% satisfied when you purchase this product and begin to use it. I will definitely be buying more products from this vendor again in the near future. I would highly recommend this seller to everyone including my friends and family members. I was searching for a new wallet for my boyfriend for his birthday and wanted one that would accommodate all of his cards. His old wallet was falling apart but this one does not seem like it will do that as it is such good quality and seems to hold a lot of stuff inside it. He was super happy when he received it and has been using it for about a month now and it still looks good as new. I’m thinking of getting this for other members of my family who need a new wallet. The leather is smooth and in great condition, no imperfections. The trifold is perfect for anyone who is looking to store a bit more in their wallet. I shopped around for a bit before choosing this one and I’m happy I chose this. Fossil really does make great products and I’m sure I’ll be buying more in the future. I like the simplicity of the design; it’s not too flashy but nice enough to show that it really is high quality. Young or old, any man (or woman) will be pleased with the purchase or gift of this wallet. I also really liked the color as it was super rich and dark looking, not dull at all. Really great and a staple for any man (or woman) looking for a new and sturdy wallet.
The shipping for this product was just on time as promised and the product was just as described so that is great!! It just works just perfectly and it is exactly what I was looking for! What an awesome product, I’m glad that I came across this product when I did. This is a great product to invest in, as it is very affordable and seems like it will last for a long time – you should try it out. My reviews are my very own opinion of the product received and just my opinion. Everyone is different and could have a different opinion of a product. I do not receive any monetary payment for my reviews, and I always keep them honest. Therefore, you have no need to worry about whether or not my review is genuine, because I’m telling you, it is. If after my initial review something changes I DO make sure that I go back and update the reviews, for good or bad reasons. I am under no obligation to provide a positive review and received no incentives or rewards for doing so, as I previously mentioned. My aim is to highlight features and drawbacks that I would want to know about as a buyer, not hype the product for the manufacturer to increase sales. My remarks are sincere and true. I work very hard trying to write insightful and thoughtful reviews for each item. My hope is that these reviews are helpful to others who may be interested in potentially purchasing this product for themselves or as a gift for others who may be interested in the product. Please let me know how I am doing by voting “YES” if you think that my review helped you in any way. If it did not, please comment with how I can improve because this helps me to be a better reviewer. I hoped you enjoyed reading.
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Reviewed in the United States on September 28, 2016
★★★★★ 5
Timeless design with excellent quality!
Color: Wilder Black
I love the sizing and material, it feels well made and durable. While some might find it a bit small, I think the size is just right for its purpose. It’s practical, stylish, and the simple design makes it look great anywhere.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 18, 2026
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