OK: GM tec: Problem: At 60-68 mph {63 worst} bad vibration in cab comming from shifter,{transmission]. At 55 OK At 70 OK. 1. At 68 mph. Push in clutch, turn engine OFF, vibration just as bad. 2. With truck on 2 post lift, removed drive shaft, and emergency bra...

FIX posted 4/18/2001

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