Jeep 1994 Wrangle with transfer case output bushing problem

I have a 1994 Jeep WranglerQuestion: Within 3 months spun tail bushing again after and before rebuild on the transfer case.  Can you tell me what I need to do to locate the problem.Answer:  We would that you check out the run out on the transfer case output shaft, use a micrometer to check the slip yoke (worn slip yoke will cause this problem) also check the u-joints and have a driveline shop high speed balance the drive shaft. Let us know what you find we can provide the parts you need.  If you send the driveshaft to us we can check it out and repair if necessary.For more technical information give Chuck a call at 800-444-0775  he can help you.