Once I get to 60, never before, the jeep starts to shake from the back end, like a wheel is loose or something. Any ideas? Its not out of line that bad, or it would do it before 60. Really need help with this one.

 

If you have not changed anything,maybe a wheel weight fell off,u-joint is going bad?

 

Someone said wheel weight the other day, because of a speed sensitivity issue. Just wanted to get a few more opinions.

Thanks.

 

How much lift?
What does the rear pinion angle look like?
Got an SYE?
Any recent carnage while wheelin'?
Had anyone tailgate ya and watch the rear wheels?

 

axle u-bolts? Shocks?

 

you forgot a ? does it go away after 70

 

Have not been out in it much yet, after putting in a new radiator, the water gasket busted, so I have to put in a new water pump...plus get some electronics working inside, as well as all the lights. So, no, no wheelin' damage yet!

It's totally stock (no lift yet) FrankZ, and I have no idea what a SYE is, nor where my pinion angle should be. A friend is going to work on the electronics while I do some under the hood stuff, I pass this info on to him.

Thanks a million!

 

@BOM...I slowed after the shaking. Ill try tomorrow.

@94sport...thanks

 

check your t-case fluid and front driveshaft for play and fluid level. Thinking back mine did the same thing right before the t-case decided to explode.

 

Awesome stuff guys, thanks.

 

If you aren't sure how to check your driveshaft u-joints, you could just take it off and go for a drive in 4-high. If the vibe goes away it's your rear driveshaft u-joints. Just be sure to mark the driveshaft in relation to the pinion yoke and also from the front of the shaft to the transfer case so you put it on the same position it came off in.

Otherwise get under there with a big screwdriver... stick it in between the u-joints and pry around looking for slop.
Have you ever greased your u-joints? If not it's most likely them.
There are many other good suggestions here also.
Mike

 

Mike, to the best of my knowledge they have not been, i got the Cherokee three weeks ago, four maybe. The guy i got it from, from the look of it, never even changed the oil the whole four years he had it. I'll look into it first thing!

 

So does that mean I need new u joints, or just grease them?

 

If they are making noise it's usually too late.
Mike

 

Really is no noise, just a strong vibration that shakes the jeep. But I guess that's noise enough!