Alright, well last Tuesday I broke my rear yoke by my rear drive axle and the u-joint, I replaced both on Friday when it all got to my house all from the Jeep dealership. It came in a Mopar box as usual.... I get the seal, yoke, u-joint all installed with the drive shaft mounted and what not. So I start the Jeep go for a test drive, and this is where my problem is.. I give it some gas getting it up to 15mph and let off the gas a little and I get a nice buzzing sound like there's something rubbing or something is loose and its slapping but there's not every thing is at its tork specs of what needs it. I replaced the u-joint up by the T-Case last summer of 2009. But what I am thinking is when my u-joint broke on me I think the drive shaft slapped up against the body a few times and fell on the ground causing the drive shaft to bend a little. So do I need my drive shaft re-balanced or do I need to get a new one, or just replace the u-joint up by the T-Case? Please reply as soon as possible.

 

If your DS is bent, it will need replacement.

 

but i have no idea if its bent or not.. is there anyway i can find out with out replacing it then turns out its not the problem

 

maybe take it to a driveline shop to get their opinion.

 

if u take it off then u can roll it on a flat surface and see if any of the ends wiggles up and down

 

alright thanks ill make sure i do that either tomorrow or the following day..

 

Jack the rear of the jeep and put it into drive , carfully watch the shaft, if it is bent you will see it...... chances are it will need replacement.

 

alright yeah ill probably end up doing that before i go doing some shopping or some repararing

 

A drive shaft place could either attempt to repear it, or even balance the bent shaft. I have. Worst case go to pick and pull..

 

ok well i started it put it into drive.... then the wheels spon for a second then stopped... how do i let them keep on spinning??

 

You need to put the rear axle on stands and just let it run. Then watch the drive line for wobble. You also could have twisted it a little. Check to see that the yokes on it are in the exact same position.

 

i put it on stands and put it in drive but nothing happend, i couldnt even get the drive shaft to spin, its solid still when i had it in the air, but idk if thats because of my opposite spin diff. or not. i dont have lockers yet.

 

is it in drive?

 

is the parking brake on?

 

no parking brake, and yes it was in drive