Hi, My WJ started making a humming noise at speeds greater than
15 mph. When this happened on my YJ, it was due to a worn ring and pinion in the rear dif. I inspected the rings and pinions on both the front and rear difs as part of other maintenance and they looked fine. The sealed U-joints in the rear drive shaft are still tight. I have not looked inside the t-case, but the special quadradrive t-case goo was recently replaced.The front propeller/drive shaft, however, rattles when I shake it. Both the front and rear CV boots are not torn. After poking around, I came across this:
I can't seem to find this part on line except at the Wyckoff dealership.
Anything else I should look into?
/herb