installed new 2-1153 u joint this evening, went together like butter...
but still have a vibration from stop to about 8mph, at least i dont have to worry about the driveshaft falling out due to wrong parts..
I will drop by Driveline in Springfield Va. and have those guys look at it..

 

Have you pulled out your lift shackles? If your pinion angle is too high it will cause vibrations.

 

Rear shackles still in, i did turn more on the front T-Bars to help level it out, planning on redrilling those shackles to lower rear about 1 inch..
im wondering if i should just replace the front u joint any way, only like $15 bucks or so. Heck i throw more money at Mcdonalds than that, and absolutly nothing in return..
I do think the drive shaft is too long im wondering if that could play into it

 

ok tuesday March 26, just returned from the drive line shop, they found a bent rear drive shaft, and the front rear u joint was also bad, so new drive shaft and $358 later i still have a vibration from start to around 10 mph, they checked the pinion angle, and was fine, they sugested that i take out the front drive shaft and see if the vibration is still there, well 4 bolts and out came the front drive shaft, drove around tha block, and still a vibration, any ideas ???
im starting to think its the zr2 rear i installed but would wheel bearings cause this ?

 

If your rear pinion angle is good right now, you probably don't want to mess with the rear shackles, as that will change your pinion angle.

A wheel bearing usually causes a vibration at higher speeds.

Does the vibration change at all if you are accelerating/going up a hill, gearing down or applying very light throttle? These would indicate a pinion angle problem.

I ran a 5" lift in my Blazer for years with no driveline vibration, so it is possible.

 

no once the vehicle is moving above 10-mpg, fast slow accelerate de- cellerate, slowing down nothing smooth as silk,all the way to a stop.
one thing to note.. the drive shaft does sit further in the transfer case
than before,i asked the driveline guy about this and he sayed the distance that the yoke in the tranfer case is ok, so i sayed but its like 2-3"
further in, and there is only about 1 - 1.5" of yoke showing when on level ground

 

My only thought is to shorten your shackles, and see if that has any affect.

 

Diaita, ok i will shorten the shackles and see what happens, on a side note, i found a place that can install ring & pinion for $350, i supply parts is that a good price? Each end, not front and rear

 

that sounds like a good price compared to what i see around here.

sorry gonna hi-jack a little.

diata...did you ever have issues with the front driveshaft ripping boots at the transcase end? my stock one tore itself up after 6 months or so of lifting...guessing the mileage had alot to do with that. but i noticed the new one i put on, the clamp holding the boot on the shaft has slipped back slightly. i have read that that connection can be converted to a u-joint instead of the cv joint design. i may look at that if it is a problem that returns.
just lookin for exp in this ....and maybe a heads up to oakie...

 

Converting to u joint on the front, there is no need for any expansion
like the rear right?