Vibrations (no wobble) at 60-65 mph

[GatorGrad17.18]

Set up: 04 TJ with 2” lift from PO. 33” General All Terrain tires

Issue: I have been working on swapping/fixing pretty much everything related to suspension and steering since purchased. i am still fighting the slightest bit of vibrations in the steering wheel (and cab at high speeds). At pretty much any speed. Take it up to 65-70 and you feel like you’re riding a rocket, almost rattle your teeth vibrations, but not a lot of steering wheel play or anything like that. Just loud and vibe. If you let off the gas, vibrations are reduced by 75-80%. Any thoughts? Maybe motor mounts? I included a pic of what I would consider the worse of the two.

Also: I am pretty sure when I got the tires mounted they did a crapy job balancing them. Going to take them to get rebalanced today.

Any additional thoughts?

Thanks!

 

[pagrey]

Tire balance normally doesn't change much when you let off the gas. That points to drive line, like u-joints, yokes and diff problems. If the tire balance doesn't help I'd start looking in that direction next. Could also be related to the pinion angle and loose control arms?

 

[HuskerJeep]

I had something similar following a regear and found that the nut on the front output shaft yoke on the transfer case wasn't tight. I posted a couple vids in this thread, easy enough to check just pushing on the front driveshaft.

https://wranglertjforum.com/threads/up-and-down-play-on-front-transfer-case-yoke.54815/#post-956884

 

[GatorGrad17.18]

Tire balance normally doesn't change much when you let off the gas. That points to drive line, like u-joints, yokes and diff problems. If the tire balance doesn't help I'd start looking in that direction next. Could also be related to the pinion angle and loose control arms?

Yeah I agree. So I took it to a mom & pop TJ shop in FL a few months back. I asked them to check pinion and they said it was fine. U-joints are squared away. They checked control arms as well and I was concerned about that since I know the bushings are old, but again they said it was fine. Not sure if there is an easy “at home” way to check the correct “tightness” of control arms? Or Yoke? Or Diff issues?

just got off the phone with my local (trusted) tire place. They want $150 to balance the tires (with no guarantees) so I may try to do some at home inspection before dropping that one something that’s probably not the main problem.

 

[Jodh]

$150 to balance tires and no guarantee? I'd find another shop. That seems about $100 too much.

 

[Nickgsjeep]

Stock control arms? Check all suspension components making sure nothing is loose. Try isolating the cause. Pull the front driveshaft and test drive, then try the same with the rear and test drive in 4 high. I agree with the above comment that if it goes away when not accelerating then it might not be tires.

 

[AndyG]

My money says tires- let us know

 

[pagrey]

They want $150 to balance the tires

My money says tires

You ain't kidding!