Installed a 4.5 lift, new coils, lower arms, shocks, etc, and new rear leafs and shocks. Put the transfer drop shims in to reduce pitch. Now all is done looks good BUT now I have terrible vibration almost like grinding noise. Starts at about 10-20 mph. Levels out now and then. Do you think it needs a SYE and new rear shaft? If so what about the front? Any thoughts or input would be appreciative.