I am still npt sure what the problem is and I would like you to perform one more test.
Jack one wheel at a time and perform the previous test and let me know the results. The amount of effort needed should be noted too.
While doing previous test, when reversing the passenger wheel, was it heavy? I take it the driver wheel was turning instead of the shaft to transfer case.
While driving, are there any abnormal noises?
Try all test again with 2WD and 4WD mode.
Monday, October 15th, 2012 AT 4:20 PM