Speed Related Vibration

[Sierra Hotel]

2020 JLUS, 57k, stock suspension (I have not verified visually - bought used in March, in the shop from May to August for corrosion issue).

Have a speed sensitive vibration from 65-78 mph. I feel it in the steering wheel, so assume it's front end related. I've road force balanced, aligned, and still have a pretty severe vibration in the speed range I've mentioned. Brand new Goodyear Wrangler Duratrac tires.

Thoughts on next step in the troubleshooting tree?

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[Craigger]

Have you whacked your rear driveshaft recently? Crawl underneath and see if there''s scratching/gouging on the driveshaft. Also, put the front on jackstands and check if your balljoints are worn (hands 12 and 6 on the tire and push/pull - any movement?). Also, make sure all bolts are tight in the front suspension components. These are the immediate, easy things I would look at first.

 

[gavilan1]

2020 JLUS, 57k, stock suspension (I have not verified visually - bought used in March, in the shop from May to August for corrosion issue).

Have a speed sensitive vibration from 65-78 mph. I feel it in the steering wheel, so assume it's front end related. I've road force balanced, aligned, and still have a pretty severe vibration in the speed range I've mentioned. Brand new Goodyear Wrangler Duratrac tires.

Thoughts on next step in the troubleshooting tree?

Don’t forget to check tie rod ends for wear. Mine wore to sloppy at 62k miles. Replaced stabilizer and suspected ball joints, before idenifying worn tie rod ends. After replacement, rides/steers like new.

 

[Jeffy56]

A defective tire can do that too.

 

[Sierra Hotel]

A defective tire can do that too.

Wouldn't that show up when balancing the tire?

 

[Jeffy56]

Wouldn't that show up when balancing the tire?

When brand new, not necessarily. If the carcass wasn't built properly it could shift after a few miles or thermal cycles. Just be aware of it. A rebalance would show it though.

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