Low speed Vibration

[aemun]

Trying to diagnose a low speed vibration I have had for a while.
It has been there through a rear end, change, tire rotation w/2 new front tires, new ball joints, new plugs, and new brakes.
It shakes mostly around 15-30mph.
Shifting into neutral does not stop it from shaking.

I suspected the U-joints are going bad or maybe drive shaft isn't balanced anymore after 2 rear end swaps.
Could be a wheel or tire is out of round, but I figure it would vibrate all the time.

Any suggestions on what to check and how to check it would be much appreciated.

 

[rs2k]

Sounds like the CV joints to me. Turn left and then right with the steering wheel hard over. Do you hear any noises?

 

[aemun]

No noise while turning. CV joints were good when we changed the ball joints.

 

[aemun]

Anyone have any ideas?

 

[rs2k]

Bent wheel? Bad u-joint?

 

[aemun]

would a bad u-joint cause it to shake like that? It's real bad when slowing down.

 

[rs2k]

I think it would, but I've never had a vehicle with a bad u-joint so I don't have any first hand experience. Try slowing down in gear and then try slow down in neutral and see if there's a difference. I would expect a u-joint to behave differently in each circumstance.

 

[aemun]

Changed the u-joints. Problem is fixed. It did vibrate the same in drive and nuetral.

 

[rs2k]

Thanks for the follow up! I'm glad that fixed your problem.