B&M 1965-1987 GM TH400/375 Automatic Transmissions. 20228 1983-nissan-200sx-esi7709208 7L Cummins Thermal Bypass Full

7L Cummins Thermal Bypass Full Flow Valve Kit is built to last a lifetime with a durable silver anodized finish and our Mishimoto Lifetime Warranty

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B&M 1965-1987 GM TH400/375 Automatic Transmissions. 20228 1983-nissan-200sx-esi7709208 7L Cummins Thermal Bypass FullThe B&M Transpak is the next step up from the B&M Shift Improver kit. It has all the features in the Shift Improver kit, plus it provides additional driver manual control (GM TH 400, 350, Ford C 6 and Chrysler Torqueflite only). B&M Transpak kit for 1965 1987 GM TH400 375 automatic transmissions. 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