I wonder if any of you can be of assistance? I have an 83 CJ-7 with the amc 20 diff in the rear; I experience some vibrations when I go over a certain speed, (round 120km/h). Friend of mine said the shaft (drive) was too short.
I was wondering what the best method would be to make sure I have the correct length (or get the correct length) drive shaft?
Is the method to measure (front) the centre of the one u-joint to the centre of the other u-joint (one by the transfer case yoke and the other end at the diff). It's currently running a 2.5-inch lift with 1.5-inch rear shackles.
Your advice would be much appreciated
[COLOR=black]2001 TJ, 4" Tera Flex Susp, 33x12.5 Mickey Thompsons on 10" Mickey Thompson Challenger Rims, SYE Toms Woods, Throttle Body Spacer, Rubicon Express Shocks, ARB air lockers front and back, 4.56 Gear ratio, Hanson bumbers front and rear