vibration is noticble when at speed but especialy on dethrottling, all the way to almost stop.
* had tires rotated and balanced*-no change
*rotors-nothing changes when braking
*u-joint- no slack or noticble noise
* clutch-no change when disengaged
I almost got stuck on snow covered hill so i give the truck a work-out. I noticed the vibration when i got back on the road. I aint a mechanic so i would appreciate any feed-back. I got 45000 miles on truck, my guess is still clutch after driving 1000 mi. I don't think rearend because its a Dana 80 and thats bullet proof -RIGHT- Thank you.

 

Check the u joints on the front driveshaft and the ones near the wheels and also make sure that it completely disengaged out of 4wd. If it didn't that maybe were your vibes are coming from.

 

how old is the steering stabilizer (if you dont know what it is it looks like a sideways shock on the front diff) they go bad alot on these trucks