Metalgearmurder

Went and messed around in a rock garden for lunch and everything seemed good. I got onto the road afterwards and now I have one hell of a vibration occuring under throttle. It gets slighter with more speed but its hard up when going slower and trying to speed up. At anypoint during the vibes when I let off of the pedal it stops instantly.. what now ?

POLAR_JEEP_04

check the ujoints in the drive shafts

mcguyver_xj

driveshaft...rear you probably dented it or ripped a weight off have it re-balanced if its not dented if its dented get a new one...u-joints would most likely clunk into and out of gear not cause a vibration

Metalgearmurder

Just did a check and no visible damage or missing weights.. Im thinking my Slip yoke may be raring its effin head now ? I had no problems till I was on rocks though so idk

Metalgearmurder

Ok so with a little more observation I can grab my rear drive shaft near the SY and i can physically feel some play. If I jerk on it in a vertical manner there is the slightest shift I can feel in the yoke. Deff think its time for a slip yoke.. but wouldnt it vibe regardless of acceleration or not?

Bustedback

The pinion angle changes on accel and decell.

ROCKSNMUD

Already check?.... -motor mounts and their bolts
-tranny bellhousing bolts
-tranny and transfercase bolts that mount to
the crossmember
- Crossmember mounting bolt going to frame
These are some items that I have had trouble with in the past that would show up under acceleration. Sometimes it would just be one of the items listed above and sometimes a combination.
Note: be sure to have a good flashlight with you and wipe off all grease and oil around the mounting points they will sure as heck hide the crack or loose bolt that you are looking for.

Hope this helps! lemme know what you find out.

Metalgearmurder

correct but my pinon angle improves (straightens out) on accelleration.. I will check everything over tonight or tomorrow as far as bolts are concerned and check back.