Two weeks ago I replaced the u joints on my rear drive shaft to remedy bad vibrations I has been having. 3 or 4 days after, I got new 3" pro comp leaf packs with shims to replace my sagging old leafs.
Since then I have had more vibrations. I went under and tried moving my driveshaft by hand, and it seemed there was a bit of play at the yoke from side to side. Ill look more into it later when I get home but my main question is an sye or front drive shaft conversion neccesary on a 3 inch lift, daily driver.

Thanks

 

Post a pic of your pinion angle....it could be off.
Here's how to measure the angle.

I would also check your u-joints.

 

So I don't think the angle is too bad, like I said the leafs came with either 3 or 4* shims. Ill look at it some more later.

Thanks

 

Not the u-joints, I can still wiggle the yoke just a touch. Ill take a look at the t case mounts this weekend, I saw the it moving a bit.