Worn out shocks already?

[ShadowsPapa]

How often do you rotate your tires? Cupping is an issue if tires are not rotated frequently regardless of shocks. 5k rotation seems work pretty well from my experience.

When I worked suspension, balance and shocks were the number 2 and 1 reasons for cupping.
People never used to rotate tires very often and cupping wasn't a problem unless there were other issues.
If the suspension is good, rotated or not, they should not cup. You should be able to drive for 20,000 miles and not see cupping even if not rotated.
There's a reason they cup. round tires in balance and held firmly on the road will not cup.

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[Srhodesjr]

How often do you rotate your tires? Cupping is an issue if tires are not rotated frequently regardless of shocks. 5k rotation seems work pretty well from my experience.

Every oil change they get rotated, so roughly 7k. No cupping issues at all until the last couple months.

 

[ShadowsPapa]

From Goodyear ->

shocks are the common theme - tire sellers and tire companies -

Shocks and springs keep the tires on the pavement. If the shocks are weak the tires can literally bounce as they travel. Of course imbalance can be a cause but bad shocks have historically been one of the top things to check.

 

[Jeeperjamie]

I'm not impressed with the Rubicon shocks anyway, leaking or not. Look cool, but looks don't mean stable.

I feel the same way about the ones I have on mine. Got about 40,000 miles on them and they are making a noise on the rear. I still got my Max Tow Shocks, I may end throwing them back on. I feel like they rode better than the Rubicon shocks.

 

[Maximus Gladius]

Had my JTR in yesterday. My passenger rear shock is seeping/leaking but not dripping yet. They said it has to drip before warranty will replace. Hate the bouncy ride, it’s a matter of time before I find me a set of bilsteins. Looking at the 8100’s.

 

[AstroZombie]

Does the truck bounce once and stay planted or give a bit of boing boing boing after a good bump? If getting nowhere with the dealer unbolt the lower mount and check yourself, take a video if they can be compressed by hand with little pressure. If still good these shocks will take some good effort to compress and bolt back on at ride height. How much sweating are you seeing at the seals?

mine doesn't bounce and it only does it when it compresses and on left side from what i can tell. Dealer told me it was because the springs weren't seated on the perch. They had to loosen the suspension and reset everything.

I added a video of the sound. Shock looks normal. Plus I found the plastic silencer (I guess) on the left rear spring is coming off. Any opinions?

 

[whiteglad]

My Wrangler Rubicon came with the KM mud tires. I did not rotate them and by 20,000 miles they had cupped badly. Never had that problem with other tires.

 

[Mac]

When I worked suspension, balance and shocks were the number 2 and 1 reasons for cupping.
People never used to rotate tires very often and cupping wasn't a problem unless there were other issues.
If the suspension is good, rotated or not, they should not cup. You should be able to drive for 20,000 miles and not see cupping even if not rotated.
There's a reason they cup. round tires in balance and held firmly on the road will not cup.

In my first hand experience on a JK and JL the tires were not rotated and the fronts cupped badly, brand new Jeeps.

 

[ShadowsPapa]

In my first hand experience on a JK and JL the tires were not rotated and the fronts cupped badly, brand new Jeeps.

Rotating tires moves the damage/wear around. They'll still cup, but you don't see the results when spread around 4 (or 5) tires.
Not rotating isn't what causes the cupping- it makes it worse because the damage/wear from the issue is spread among more tires.
Fixing the issue up front would have resolved the cupping issue - however, once the cupping starts, it's going to continue because now you are rolling a cupped tire down the road and it's still going to keep wearing.
There can be imbalance issues that you don't feel driving the vehicle, but will still wear tires, even cupping.

Had you rotated, then you'd have cupping on all 4, although not as deep because you would have spread it around 4 tires and it might not have been as noticeable. New doesn't matter. We've all seen issues here with brand new Jeeps.

That's from training, and selling/servicing tires for years ?

If everything is perfect, you can run a set of tires for most of their life and not rotate them. I never used to rotate the tires on my F250. The tires all seemed to wear very evenly and the originals lasted about 50,000 miles, all worn about the same.
The issue is that fronts tend to wear differently that rears which tend to wear straight across. Fronts tend to wear edges more, so rotating them evens that out. How much different depends on the vehicle - how much camber, caster and toe they have. Heavy caster causes wear, heavy camber causes wear. The tires tip in or out as you turn. Rotating evens it all out.

Bottom line - rotating spreads wear out. Not rotating keeps any issues with that corner/axle on the same tires for their life. So rotating tires may mean you have problems but don't see them.

 

[Maggyver]

Recently my Mojave has been riding super rough and loud with a decent vibration on the road. Took it to the shop to get rotated and balanced and it was all good there but noticed the tires have some pretty decent cupping. Looking it up, it seems like that’s a suspension issue. More specifically, worn out shocks. I only have 30k on the car total. Mostly highway miles. Off road occasionally but nothing drastic.
has anybody else experienced this already?

I took my Mojave in today with 16,900 miles on it. I thought I had an out of balance wheel and went to the nearest tire shop. They showed me cupping on both rear tires… that had been rotated at the dealer with my second Jeep Wave oil change about a thousand miles ago (first change they recommended NOT rotating).
The service rep at Jeep said he thought it could be the stabilizer. He was unable to tell me if they could cover the tires under warranty. I know they should, and I’ll push for it. Kinda suck to have to beat them up to make something right.

 

[Gren71]

I still think that all the issues people are experiencing with those models built in mid-late '20 to early '22 are a direct result of not enough people conducting quality control because of COVID. Just not enough people available to perform those tasks and a lot of shoddy things made it into production.

Every time I consider trading in to take advantage of the high trade value this is EXACTLY what i think about. Its stopped me numerous times now. Ill keep plugging away with my ‘20 (born in ‘19) at 88k miles and see what happens.

Ive had max tow shocks, jtr fox shocks, and the fox shocks off a mopar lift. I liked the set off the mopar lift so far. They feel like my max tow ones but are long enough i dont need shock extensions with my 2in spacers.

 

[ShadowsPapa]

They showed me cupping on both rear tires… that had been rotated at the dealer with my second Jeep Wave oil change about a thousand miles ago

One other thing that can cause cupping, but it normally happens on the outer treads of a tire - UNDER-inflation. And Jeep people love to run tires under-inflated.

Without looking back, I think some of what I posted earlier may have included that as a cause.
Causes of cupping - bad/weak shocks, wheel problems, worn/weak shocks, tire balance - and under-inflation.

I knew people would balk at that thought, so I went back to my college books for the explanation.
Rather than type out the explanation - here it is right from a college text book:

I also found this explanation on the internet when looking into the weird front tire wear I had on my 2020.

 

[gates007 [scammer]]

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[ShadowsPapa]

One other thing that can cause cupping, but it normally happens on the outer treads of a tire - UNDER-inflation. And Jeep people love to run tires under-inflated.

Without looking back, I think some of what I posted earlier may have included that as a cause.
Causes of cupping - bad/weak shocks, wheel problems, worn/weak shocks, tire balance - and under-inflation.

I knew people would balk at that thought, so I went back to my college books for the explanation.
Rather than type out the explanation - here it is right from a college text book:

I also found this explanation on the internet when looking into the weird front tire wear I had on my 2020.

I forgot to add that the effect that caused the cupping as described and pictured by Ford Motor Company in the post above can also result in a slightly different pattern, but similar, depending on the tire compounds and other factors - a sort of saw-tooth pattern along the same outer treads that may cup on others. It's the same effect - underinflation, pile-up of rubber as it's pushed along the road, then once the friction of the road is overcome by the "windup" of the rubber, it drags back making sort of a sawtooth or feathered pattern.
If you see cupping along the outer threads (not in the middle section) or a feathering or directional saw-tooth pattern in the same areas - you are likely running tires underinflated.

 

[skyline45]

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