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- USA
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- USA
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
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For Your Every Summer RSVP, with Code: SUMMER15
Description
B&M Shift Improver Kit - GM TH400/475 Transmissions - 20261Overview: The B&M Shift Improver kits feature two options to recalibrating your 1988 1994 GM TH400 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
Overview:
The B&M® Shift Improver kits™ feature two options to recalibrating your 1988-1994 GM TH400 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 Off-Road, Towing or Street/Strip Use
- Eliminates Soft and Sluggish Shifts
- Over 65 Years of B&M Quality
- Eliminates Shift Overlap
- Provides Crisp Shifts
- Easy Installation
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| 1988 | Chevrolet | R20 | Custom Deluxe | |
| 1988 | Chevrolet | R20 | Scottsdale | |
| 1988 | Chevrolet | R20 | Silverado | |
| 1988 | Chevrolet | R20 Suburban | ||
| 1989 | Chevrolet | R2500 | ||
| 1989 - 1990 | Chevrolet | R2500 Suburban | ||
| 1988 | Chevrolet | R30 | ||
| 1989 - 1990 | Chevrolet | R3500 | ||
| 1990 | Chevrolet | V1500 Suburban | ||
| 1988 | Chevrolet | V20 Suburban | ||
| 1989 - 1990 | Chevrolet | V2500 Suburban | ||
| 1988 | Chevrolet | V30 | ||
| 1989 - 1990 | Chevrolet | V3500 | ||
| 1988 - 1990 | GMC | C1500 | ||
| 1988 - 1990 | GMC | C2500 | ||
| 1988 - 1990 | GMC | C3500 | ||
| 1988 - 1990 | GMC | G1500 | ||
| 1988 - 1990 | GMC | G2500 | ||
| 1988 | GMC | G3500 | Rally | |
| 1988 | GMC | G3500 | Rally STX | |
| 1988 | GMC | G3500 | Vandura | |
| 1988 | GMC | G3500 | Rally Custom | |
| 1988 | GMC | G3500 | Magnavan | |
| 1988 | GMC | G3500 | Rally Camper Special | |
| 1988 | GMC | G3500 | Vandura Special | |
| 1989 - 1990 | GMC | G3500 | ||
| 1988 - 1990 | GMC | Jimmy | ||
| 1988 - 1990 | GMC | K1500 | ||
| 1988 - 1990 | GMC | K2500 | ||
| 1988 - 1990 | GMC | K3500 | ||
| 1988 - 1989 | GMC | P2500 | ||
| 1988 - 1990 | GMC | P3500 | ||
| 1990 | GMC | R1500 Suburban | ||
| 1988 - 1989 | GMC | R2500 | ||
| 1988 - 1990 | GMC | R2500 Suburban | ||
| 1988 - 1990 | GMC | R3500 | ||
| 1990 | GMC | V1500 Suburban | ||
| 1988 - 1990 | GMC | V2500 Suburban | ||
| 1988 - 1990 | GMC | V3500 | ||
| 1988 - 1990 | Cadillac | Brougham | ||
| 1988 - 1990 | Chevrolet | Blazer | ||
| 1990 | Chevrolet | C1500 | Cheyenne | |
| 1990 | Chevrolet | C1500 | Scottsdale | |
| 1990 | Chevrolet | C1500 | Silverado | |
| 1990 | Chevrolet | C1500 | 454 SS | |
| 1990 | Chevrolet | C1500 | WT | |
| 1988 - 1989 | Chevrolet | C1500 | ||
| 1988 - 1990 | Chevrolet | C2500 | ||
| 1988 - 1990 | Chevrolet | C3500 | ||
| 1988 - 1990 | Chevrolet | G10 | ||
| 1988 - 1990 | Chevrolet | G20 | ||
| 1988 - 1990 | Chevrolet | G30 | ||
| 1988 - 1990 | Chevrolet | K1500 | ||
| 1988 - 1990 | Chevrolet | K2500 | ||
| 1988 - 1990 | Chevrolet | K3500 | ||
| 1988 - 1989 | Chevrolet | P20 | ||
| 1988 - 1990 | Chevrolet | P30 | ||
| 1990 | Chevrolet | R1500 Suburban | ||
| 1988 | Chevrolet | R20 | Cheyenne |
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 |
| 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
4.8 ★★★★★
Based on 2036 reviews
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Product Reviews
★★★★★ 5
So good - I’m buying MORE.
Number of Items: 3, Color: White (3-pairs), Size: Medium
I’m gonna give you more detail than you need about why I’m buying these socks again.
I’ve been the mom of girl athletes. I’ve been a model and a fashion director. I’ve worn every brand of shoe on the planet and never found a shoe that did NOT find a vulnerable spot on my foot to rub raw. Even my beloved white Jack Purcell sneakers.
With that said - I don’t like socks. I’ve bought a TON of them in 35+ years.....all major brands.
They shift. They lose their shape. They get holes in them and wear out too fast. Not these.
I retired this year, and knowing I’d be in sneakers a lot, traveling, sightseeing ......
I bought these 6 months ago and have worn them constantly. I’ve traveled with them. I’ve washed them in hot water and bleach.
The socks are like brand new. They are exactly the right cut so as not to be seen in a basic sneaker. The little silicone patch on the heel stays put. Not once have I had to dig down into my shoe and pull the sock back up. The socks have stayed soft and EXACTLY the same as the day they were new.
Like I said - I am back to buy them again. Great quality!
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Reviewed in the United States on January 20, 2021
★★★★★ 5
No slip low socks
Number of Items: 3, Color: Black/White (3-pairs), Size: Medium
Perfect! ❤️ these!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 16, 2026
★★★★★ 4
Stay put!
Number of Items: 3, Color: White/Neutral (3-pairs), Size: Medium
Nice and thin, soft, and stay put. I wear an 8 shoe and don’t like a thick sock taking up room. These socks are a bit tight on big toe. Wish they came in large.
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Reviewed in the United States on October 10, 2023
★★★★★ 5
The best
Number of Items: 3, Color: White/Neutral (3-pairs), Size: Medium
The best no show socks I have found. Stay in place very well and hold up wash after wash. I have tossed all the other brands I’ve bought over the years and stocked up on these as I was tired of digging through the drawer hoping to find a clean pair.
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Reviewed in the United States on December 8, 2024
★★★★★ 5
Love these.
Number of Items: 3, Color: White (3-pairs), Size: Medium
I have them in black and white. I use them everyday in all shoes. These are very versatile and a great quality material. They take a looong time to wear and they stay in place. Very washable and good material. They are not too thick and they do not shrink. I do air dry mine. They do not hold smells even in the summer heat.
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Reviewed in the United States on July 7, 2024