New tires started problems

[Quatloo]

2022 Willys diesel.
At 16,255 miles i had Cooper at3 4s tires put on.
They dribbled like a basket ball and caused death wobble on any crack in the road. Re-balanced 3 times no improvement.
After 1100 miles replaced with Mastercraft courser trail. Dribble and death wobble now gone and smooth as glass below 50.
above 55 it starts a shuddering noise and starts a shake that remains until it slows to 55.
I am at a loss, it didn't have any problems before the tire change.

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[jhackathorne]

Sounds like you need to check your front suspension and make sure everything is torqued properly. The tires only exacerbated the issue it seems.

 

[Ten North Prez]

I would venture a guess that the small difference in tires is pointing you to an issue hidden until now. You mention problems with both new sets, just not as pronounced with the second. There is a problem there somewhere. If the balance on the tires are good and the alignment is on, then you need to start checking the front end.

 

[jludave]

I am at a loss, it didn't have any problems before the tire change.

Need more info.

Stock suspension? Lift? New tire size/s?

 

[The Last Cowboy]

Your tire shop is incompetent.

 

[Quatloo]

Need more info.

Stock suspension? Lift? New tire size/s?

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[Quatloo]

Your tire shop is incompetent.

NO

 

[Quatloo]

Sorry caps lock is necessary on work computer.

 

[The Last Cowboy]

Okay. 2 sets of tires and they can't get them balanced. Vibration beginning at a certain speed is a dynamic balancing problem. I used to work in a tire shop at one time. And, in your orginal post, you stated that the issue was not evidnet with your previous set of tires.

 

[jludave]

ALL STOCK

You might have something loose somewhere in your front suspension. However, if the issue didn't start until you changed tires, it's highly likely that your tire shop is not balancing your wheel and new tire combinations properly.

Cooper tires are known to be a bit difficult to balance properly. They tend to require a bit more weight than other tires.

 

[Mikester86]

If you know someone that has the same size tire and rim bolt pattern, you can swap their tires to test. ??‍

 

[The Last Cowboy]

Many tire shops spin the wheel, put wheights where the machine says to put them, then pull it off the machine without rechecking. Many shops will put more than 4oz of weights on one wheel without trying to move the tire to get a better result. If you see a massive amount of weights on a wheel it means one of 3 things, the tire is out of round (even a new one), the wheel is damaged (bent or flat spotted), or the guy mounting the tires is clueless about how to get a good balance.

Also keep in mind, the tires were mounted with a lube to ease getting the tire on the rim without damage. That lube takes awhile to dry. If you leave the shop right away, and don't drive real easy, you can spin the tires on the wheels to the point where they are no longer balanced. So mark on your tire where the valve stem is. If the tire moves from that mark, it will now be out of balance.

 

[Yawnie'sPapa]

Okay. 2 sets of tires and they can't get them balanced. Vibration beginning at a certain speed is a dynamic balancing problem. I used to work in a tire shop at one time. And, in your orginal post, you stated that the issue was not evidnet with your previous set of tires.

Yes - with one exception I had.......... a wheel that was slightly egg shaped. 2 shops, one a tire shop, another a "axle and wheel" shop. They all said "wheels and tires are fine".
I took the wheels to a shop to get them restored (they are rare original sport wheels from an 82 Eagle) and they said as soon as they started their CNC machine up to refinish the wheel, they knew something was wrong. They straightened it up, machined all wheels, balanced, etc. and now there's zero vibration at any speed.
I could drive "through it" - once over 70 it was fine, but when I hit a bit over 60 it shook the crap out of things enough I thought something would break. But once I got over a bit over 70, it was "mostly smooth" again.



My experience with tires (a bit dated compared to most) is that some tires are really tough to balance, and others balance easily. My neighbor and I have both been amazed with how easily General tires balance.
On the other hand I had tires on my F250 that were a #$%@ to get balanced.
A shop is only as good as the person or persons working on your vehicle. They may have a stellar reputation and be fantastic - save for the day you are there and then Sam works on your wheels and he's new and doesn't re-check things after balancing once.
I always spun things up, did what the machine said - did it again, and so on until it came out perfect. Takes a tad more effort, but my OCD demands perfection on things like that.

On a Jeep it never hurts to recheck torque on everything and look for worn parts. The tires are a lot of spinning mass- a lot of weight out there and any imbalance hammers on the bushings, and tries to knock bolts loose.
I torque things when I'm done doing something and then use a marker or paint pen and mark bolt and nut positions. I did that on my newer Jeeps after I got them so that any time I was under there, I could see "what changed".
Any time there's an issue - troubleshooting 101 - ask "what changed". (what's different than it was)

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