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B&M 70239 Shift Improver Kit for GM Transmissions - TH700R4/4L60

(GMC G2500 1983-92, Yukon 1992, Sonoma 1991-93, K1500 1982-92, C1500 1982-92, K2500 1982-92, Jimmy 1982-92, C3500 1982-91 + 121 more models)

Part of: B&M Shift Improver Kit for GM Transmissions

Other options in this family: B&M 30262 B&M 50260 B&M 20261 B&M 50262 B&M 10226

Manufacturer

Picture for manufacturer B&M

Part Number

70239
8 reviews
Sale Price

$90.69

In Stock (5)

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Usually delivered within 2 days

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No Hassle Returns

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Fitment guaranteed

Fitment guaranteed

Product Details

The B&M 70239 Shift Improver Kit is designed to enhance the performance of GM TH700R4 and 4L60 automatic transmissions by delivering firm, crisp shifts and eliminating the soft, sluggish shifting characteristics common in stock transmissions. This performance upgrade addresses shift overlap issues that can cause inefficient power transfer and premature transmission wear.

Key Features:

  • Provides significantly firmer, more responsive shifts for improved performance
  • Eliminates shift overlap to maximize power transfer efficiency
  • Corrects soft and sluggish shifting behavior found in stock transmissions
  • Easy installation with included instructions and components
  • Ideal for towing applications, street performance, and drag racing use
  • Compatible with GM TH700R4 and 4L60 automatic transmissions

This shift improver kit is an excellent choice for enthusiasts seeking better transmission response without the expense of a full rebuild. Whether you're towing heavy loads or looking for quicker acceleration at the strip, the B&M 70239 delivers noticeable improvements in shift quality and transmission performance.

Products specifications

Fits

GMC G2500 1983-92, Yukon 1992, Sonoma 1991-93, K1500 1982-92, C1500 1982-92, K2500 1982-92, Jimmy 1982-92, C3500 1982-91, K2500 Suburban 1982-92, K3500 1982-91, C15/C1500 Pickup 1982-83, Safari 1985-92, C2500 1982-92 + 116 more models

Automotive Item Grade

High Performance

Brand

B&M

Prop 65

Yes

California Proposition 65 Chemical Name

Cadmium and cadmium compounds

Category

Transmission

Emission Code

5

Gasket Included

Yes

Instructions Included

Yes

Manual Control

No

Part Type

Automatic Transmission Shift Kit

Product Type

Automatic Transmission Valve Body Kit

Sub Category

Service Kits

Transmission

700R4

Transmission

4L60

Warning

California Proposition 65

Prices are among the lowest around. Had a change with my order. Customer support team was quick to respond to emails and make corrections. Will order from Autoplicity again.

Petty good

Great price, good e-mail communication and fast shipping. Positive experience with Autoplicity so far.

Prices are great on this site. The layout and checkout process are easy to use; Google checkout is definitely a plus. Shipping could be a little faster, especially if they had drop ships from their supplies for items not currently in stock. Overall good service and no problems.

I bought this item for my fiance and he loves it! He was completely happy with the price we paid...

easy website to navigate and ordering was a breeze.. Item purchased was damaged in shipping and autoplicity was all over it.. Currently wait on my replacement parts with no hassle.. Over all great service!!

Autoplicity has made my parts search so much easier. With the best price gurantee, i can now make autoplicity my one-stop shop for all my parts needs.

Good site easy to search for and find parts. The lowest prices on almost every part I have been able to find for my truck.

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