1986 GMC school bus with a 366
I had new ujionts and carrier bears put in it and i asked the guy to make the drive line because it has a 4 piece drive line so it would go back the way it come out so it would stay in time he did and now i have a bad vibration and i need to know if it has to be in time with the third member or is it in the aliment of the four piece drive line came anyone help me with this?
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