I have a stock 2001 GC Laredo w/ 55K. I have the Selec-Trac TC, not sure what the NP number is.
When I put it in 4WD Full Time, I have a vibration right under my feet. I am not a car guy, but I was thinking drive shaft or u-joints?
The thing is, the way I understand it, is that there are no hubs in the Jeep, so the axle and drive shaft are always turning, so why does it not happen, when I am in 2WD?
Anyway some history:
Just had the differential rebuilt, bearings and spacers and nut pinion.
And two weeks after that, it was leaking diff fluid, brought it back to the dealer, and they replaced the pinion seal.
Could they have screwed up on the diff? I will be bringing it back this week to the Jeep dealer, thank god I bough a 3/36k warranty, even if it is from "joe blow", they paid for the diff rebuild
Anything to give me some piece of mind that my truck is now screwed up beyond belief, is greatly appreciated.