I'm having the exact same problem, I suspect it is the central axle disconnect causing the problem. This could be due to the vacuum valve on the transfer case, vacuum actuator, or a mechanical problem with the CAD shift fork or spline sleeve.

Answered by donbrown1
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*** Update ***
I finally got everything disassembled for inspection. The alignment bushing for the intermediate and outer axle in the CAD box had worn about 1/16 inch in diameter to .690". This allowed the outer axle to "whip" around on the intermediate axle stub which was causing vibration and the grinding noise. The vibration was so bad that it destroyed the outer axle seal too. I replaced the seal and upgraded the cheap nylon factory bushing to an oilite bronze flange bushing. The dimensions are 13/16" OD X 5/8" ID X 3/4" long.

Answered by donbrown1
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i saw the tsb on this as well.

roy

Answered by ASEMaster6371 (expert)
24,973 answers provided