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hello i have a 1999 zl and i have huge vibrations at 70 mph and up. i heard from a lot of people that this vibration can be caused by the jack shaft being bent i brought it to a machine shop and it was off by 1 thow but my disk brake was off by 20 thow, so i changed it and i still have vibrations. all so there is a brand new drive shaft and bearings. all though i did not change the bearings in the jack shaft i am not sure if it is that.
if u have any ideas please tell me thanks
if u have any ideas please tell me thanks