B&M 20228 B&M Transpak shift kit.
1965-1987 GM Turbo 400 transmission shift.
Recalibrate your Turbo 400 automatic transmission for optimum performance and lifespan.
Transmission removal is not required for installation of the Transpak.
Detailed installation instructions are included.
Select from two included modes.
The Transpak has all the features of the Shift Improver Kit plus it provides additional driver manual control. Most stock automatic transmissions won't downshift into low gear above 15 mph, and automatically upshift at a predetermined speed no matter what gear you're in. With the B&M Transpak, you can downshift at any speed, and you can hold the transmission in first gear to any speed that you want! This is an asset when you've got a modified engine and you want additional RPMs or you're towing a trailer or driving heavy loads downhill.
STAGE 1. HEAVY DUTY: For street rods, normal passenger vehicles or other heavy duty applications. Firmer shift feel but not harsh. Improves transmission performance and life dramatically without loss of comfort. Normal automatic operation when in "drive."
STAGE 2. HI-PERFORMANCE STREET: For full performance street applications. Essentially the same as Heavy Duty mode except the shift is much quicker. Retains full automatic features and standard shift points when selector is in "drive".
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