Probably bent the output shaft which in turn would be killing the unis.
Stock gearing doean't help - but lack of attention to the driveline angles is probably the main problem.
__________________
Shops locally at www.wooders.com.au
No matter how smart you think you are - You're wrong.
Just so that I understand, you are running 3" lift with no changes to motor mounts, transmission skid, slip yoke, and rear control arms. If all you have done is lifted it 3" with no other modifications to compensate and correct driveline angles, driveshaft u-joints would be excessive stress when rear axle cycles through the motion range. Add wheel spin to mix, something has to give. Usually the weakest link breaks.
I have a SYE, double cardon driveshaft, not sure about the control arms. Ill defineatly look into getting motor and transmission mounts. Im in the middle of saving for 4.11 ratio change and air lockers.
Did you get a bit of drivetrain vibration while on the blacktop ? Like a droning noise under load or decelleration ? I'm getting that at the moment after a 3 " lift install. Advice from Wooders via Superior Engineering is that I need adjustable rear uppers to correct the angle of the SYE double cardan rear tail shaft ...........else uni's will snap and stuff will wear out and the car would continue to drive like sh@t. So the adjustables are on order .........more money down the Jeep hole ............
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