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:
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.

More From This Category

Motive Gear Ring and Pinion, 4.56 Ratio, For Dana 30, 7.125 in., Set

Motive Gear Ring and Pinion, 4.56 Ratio, For Dana 30, 7.125 in., Set

$291.30

Strange US Gear, Ring and Pinion, Mopar 12-bolt, 3.73, 29 Spline, Fits 489 Case, 8.75 in. OD, Set

Strange US Gear, Ring and Pinion, Mopar 12-bolt, 3.73, 29 Spline, Fits 489 Case, 8.75 in. OD, Set

$568.44

Motive Gear Ring and Pinion, 4.88/4.89 Ratio, For F8.8F/F9.75R, 8.8/9.75 in., Kit

Motive Gear Ring and Pinion, 4.88/4.89 Ratio, For F8.8F/F9.75R, 8.8/9.75 in., Kit

$1,607.83

Differential Traction System Grip Lok Plus, Mechanical Locker, Ford 9 Inch, 31 Spline, Each

Differential Traction System Grip Lok Plus, Mechanical Locker, Ford 9 Inch, 31 Spline, Each

$834.75