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B&M 40266 Shift Improver Kit for 4R70W Automatic Transmission

(Ford F-150 1996-99, Mustang 1996-99, Explorer 1996-99, Expedition 1997-99, F-250 1997-99, Crown Victoria 1996-99, Thunderbird 1996-97 + 21 more models)

Manufacturer

Picture for manufacturer B&M

Part Number

40266
10 reviews
Sale Price

$207.95

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The B&M 40266 Shift Improver Kit is designed specifically for 4R70W automatic transmissions to enhance shift performance and eliminate common transmission issues. This performance upgrade provides crisp, firm shifts while removing the soft and sluggish shift feel found in stock transmissions.

Key Features:

  • Eliminates shift overlap for improved transmission longevity
  • Provides firm, positive shifts that reduce slippage and heat buildup
  • Easy installation with included instructions
  • Compatible with stock 4R70W automatic transmissions
  • Backed by over 65 years of B&M engineering excellence

This shift improver kit addresses the factory transmission calibration that prioritizes smooth, soft shifts over performance and durability. By modifying the hydraulic circuits, the B&M shift kit delivers quicker, more decisive shifts that reduce clutch pack wear and extend transmission life. Ideal for performance applications, towing, or anyone seeking improved transmission response from their 4R70W-equipped vehicle.

Products specifications

Fits

Ford F-150 1996-99, Mustang 1996-99, Explorer 1996-99, Expedition 1997-99, F-250 1997-99, Crown Victoria 1996-99, Thunderbird 1996-97, E-350 Super Duty 1999, F-250 Pickup 1997-99, E-350 Econoline 1997-99, E-150 Econoline 1996-99 + 17 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

Part Type

Automatic Transmission Shift Kit

Product Type

Automatic Transmission Valve Body Kit

Sub Category

Service Kits

Warning

California Proposition 65

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