Looking for anyone who have experienced this... yesterday my 2012 5.0L started to jump or skip in 4wd high, been snowing where I live and when I give it gas it's like its jumping or something and even this morning I tried it on the way home from work same thing and it does it with cruise control on, I'm thinking something is gone sideways in my t-case

 

jumping or skipping? Please try to describe better. To me it just sounds like loosing traction, spinning tires and ratcheting LS diffs. Add some speed to the mix and some challenging corners. Lotsa fun!

 

[QUOTE=FaceDeAce;6381301]jumping or skipping? Please try to describe better. To me it just sounds like loosing traction, spinning tires and ratcheting LS diffs. Add some speed to the mix and some challenging corners. Lotsa fun!
When I'm driving straight its jumping lol not sure how to describe it feeling like drive shaft is skipping which is making it feel like its jumpong

 

Might want to have your transfer case looked at.

 

There are a couple of things that could be going on then:

1. - using 4wd on surfaces that do not need 4wd. When 4wd is engaged the drive train front to back is locked together. There is no driveline slippage between the front wheels and the rear wheels. When the vehicle is turned, the front tires take a longer path than the rear tires. Since the driveline is in sync and locked by all the gearing, that path length can only be relieved by slippage of the tires at the road surface. If the amount of tread wear or air pressure between the front and rear tires is different, then this binding can also build-up on a straight away, compounding with each rotation. When in snow and ice or mud or gravel or sand etc, the necessary tire slippage to relieve the binding happens easily and goes un-noticed. When on a grip surface, like asphalt or concrete or hard pack dirt, there are incredible forces building in the drive-train and when a tire finally slips there is a "jump" or bark of the tires. If the vehicle is equipped with really good tires, or oversize tires, which have exceptional traction, the tires will not slip at all. The binding forces in the driveline build to tremendous levels and instead of the tire slip there will be a loud bang as a driveline component(s) SNAP. Then you're walking home. It can happen when " I was just driving along normally and BANG " . The point: NEVER ever use 4wd unless conditions through a patch are slippery and 4wd is necessary. Turn it on through the snow and icy patches. Turn it off on the wet and dry patches. That is what the shift on the fly switch is for. There are tremendous strains and wear on the drive-train on road surfaces where there is plenty of traction.

2. - binding CV axle joint(s). A worn and binding CV axle will be very stiff to turn and may cause vibration when in 4wd. Unlikely to cause a jump though.

3. - the front drive shaft, not the axle, not the CV, the actual drive shaft between the transfer case and the front diff. Has universal joints and a slip joint. If those are worn, dry, stiff, etc. Can cause some binding and vibration. If the slip joint is really dry and binding hard, then when it does slide with a jolt, certainly that could feel like a jump. Generally though, it will feel like a clunk and a steady light thumpa-thumpa-thumpa-bumpa-bumpa vibration.

4. - A front differential that needs an oil change. A front differential actuator or 4wd engagement unit that is sticky. May cause bangs, clunks, minor jumps as it engages and disengages.

5. - A 4wd-AUTO equipped system where the 4wd is engaging and disengaging, when components are sticky or tires are already spinning. See 4 above.

Hope that helps!