B&M Transpak - GM TH700R4/4L60 Transmissions - 70235 exhaust-reducers Part Number: 815425

Part Number: 815425

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B&M Transpak - GM TH700R4/4L60 Transmissions - 70235 exhaust-reducers Part Number: 815425Overview: The 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 1982 1993 GM TH700R4 4L60 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