I have a 08 X Standard with a 2.5 suspension lift and 33inch tires. I am getting a squeek coming from the rear driveshaft where it enters the differential. The squeek is not constant, it only happens at one point in the rotation. I can put the jeep in neutral in the driveway and push it back and forth and only at one point does it squeek, going either forward or backward.

Any ideas on the problem? I will bring it by the dealer this next week, but I expect to hear something about how the lift changes the driveshaft angle so it is not covered...

 

Not sure what to do about this. I suppose wash the under body and then grease it up. See if then the squeak goes away. Also, check for any rubbing around the yoke and boot.

Oh, and thank you! I believe you may have just solved where my squeaking problem is coming from.

 

Assume that I only know basic mechanics. Where would I lube this part? I do not see a grease fitting or anything under there.