SKU: 11139755172

B&M Shift Improver Kit - GM TH400/475 Transmissions - 20261

Sale price$78.70 Regular price$87.45
Save 10%

Pay in installments of $21.86 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 24 - Jul 29

Promo Codes Available:

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:
  1. 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
SKU: 11139755172

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.6 ★★★★★
Based on 26 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
J
Verified Purchase
julie h.
Lexington, US
★★★★★ 5
So versatile! Perfect solution for dividing a room.
Size: 4 Panel-88'', Color: Grey, Size: 4 Panel-88'', Color: Grey
Perfect solution for my space. My office has to double as the hangout room for the kids and I wanted something that would block off my computer so it is left alone. This space allows me to close off my computer as much or as little as I want. It is lightweight yet has sturdy feet. This is important so that if it gets bumped it won’t topple over. The price was great and the build time wasn’t too bad! I would recommend two people for set up. I went with the grey panels and I think I’ll end up hanging some twinkle lights at some point. Great purchase!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 9, 2025
A
Verified Purchase
Abbi
Omaha, US
★★★★★ 4
4/5 Stars
Size: 4 Panel-88'', Color: Black
Very tall and easy to set up, the only thing I will say is that they do have large gaps in between, so you won't have 100% privacy unless you add a curtain in the back. Other than that, they are easy to fold, sturdy, and esy to assemble. The gaps are an easy fix so I would say they are worth it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 16, 2026
T
Verified Purchase
Tyi Campbell
Belleville, US
★★★★★ 5
Great product and worth the money.
Size: 4 Panel-88'', Color: Black
Portable and stable. Perfect size and gives me the privacy I need when working from home. Stability is great as long as you place the stands correctly it won't wobble. I love it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
M
Verified Purchase
Mona T.
Fort Morgan, US
★★★★★ 5
Attractive
Size: 4 Panel-88'', Color: Grey
The assembled product is just as described. The screens look great! I am using them to hide the cluttered shelving in my garage. The area now looks quite neat Something I must say, though, is that the assembly was extremely difficult. I had to use a silicone spray and some pounding to get the A and B poles to fit together. Also, it required a great deal of strength to stretch and hold the fabric panels so that the bars inserted in each hem lines up with the screws inserted in A/B poles. I strongly recommend having a partner to help with the assembly. while sc and screw into poles them once inserted intetchedtne end of each pole ( and B poles barely fit together. I used silicone spray on the end and then pounded them
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 12, 2025
K
Verified Purchase
karine
Waukegan, US
★★★★★ 5
Works
Size: 3 Panel-102'', Color: Beige, Size: 3 Panel-102'', Color: Beige
It’s beige and not white. Once install - hard to disinstall. Need a drill to put it together
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026

recommand products