Sounds like a classic VC problem in the np249.


"Hillbillyd" > wrote in message
ups.com...
> Hey everyone, hope somebody knows the answer to this one. I have a 1995
> Jeep Grand Cherokee Limited with a 5.2L V8, full-time 4wd. It has an
> automatic with the NP249 transfer case. When I drive it, especially at
> 70mph or more for a mile or so, the Jeep starts making a thumping sound
> in the driveline and something is trying to bind up because I can hear
> the tires faintly screeching on the asphalt. The first time it
> happened, I thought I had a flat. It was that kind of sensation. I can
> pull to a stop, then take right back off and things are fine until my
> speed comes up, then all over again. I can hear it affecting my
> driveline, sounds like somebody pecking on my driveshaft with a small
> hammer. Here is what I have replaced so far:
>
> Rear driveshaft U-joints
> Front driveshaft from end to end
> Front axles
> Front spider gears
>
> None of these have helped which has led me to believe it is the
> transmission or transfer case. Anybody have any ideas?
>
> Thanks,
> Derrick
>