Hello,

I am experiencing a vibration from the mid to front of my truck when I put it in 4wd HI. I have replaced the front Driveshaft already and used the greasable u-joints. It speeds up as my speed rises, which seems to me like it might be a u-joint, but if it were a u-joint wouldn't it make the vibration all the time, because our front Driveshaft is always turning.

Could it be something in the transfer case? I am just trying to get some input before I go freeze my rear end off trying to fix it. Of course I only found this out when I needed it this morning for the super slick icey roads.

Any input would be greatly appreciated.

Jason

 

Are all tires inflated the same?

 

yeah the tires are inflated the same all set at about 37psi. It only happens when in 4wd. Kind of makes me wonder if the T-case is ok? I don't usually abuse it, but 3-4 sled pulls this year might of helped wear it out I guess.

 

I've had axle universals fail and cause those vibrations.