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20260 - B&M Shift Improver Kit - GM TH400 Transmissions - default Image
20260 - B&M Shift Improver Kit - GM TH400 Transmissions - additional Image

B&M Shift Improver Kit - GM TH400 Transmissions

1965-1987 GM TH400, TH375 and TH475 Automatic Transmissions.

PART# 20260

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Fits 1965 to 1987 GM Turbo-Hydramatic 400, Turbo-Hydramatic 375 and 475 automatic transmissions

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
  • Eliminates Shift Overlap
  • Provides Crisp Shifts

Specs

Automotive Item GradeHigh Performance
BrandB&M
California Proposition 65 Chemical NameCadmium and cadmium compounds
California Proposition 65 RequiredYes
Emission Code5
Gasket IncludedYes
Instructions IncludedYes
Manual ControlNo
Product TypeAutomatic Transmission Valve Body Kit
Part Number20260

Emissions

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

In The Box

In The Box

  • Gaskets
  • Seals
  • Drill Bit and Fluid Separators

Tech Resources

Fits 1965 to 1987 GM Turbo-Hydramatic 400, Turbo-Hydramatic 375 and 475 automatic transmissions

Applications

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