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ZL1 Wheels/Tires Wheels and tires discussion for ZL1

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Old 11-07-2012, 10:00 PM   #1
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Tires Rubbing

Does anyone hear some rubbing when making tight turns at slow speeds?

I park in a garage with epoxy floors and mostly notice when making the turn out sounds like tires are rubbing the inner well!

No noise when wheels are straight.
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Old 11-07-2012, 10:13 PM   #2
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Have you pulled a tire yet and looked for rub marks on the inner fender to verify?
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Old 11-08-2012, 12:25 AM   #3
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Make sure that the dealer removed the spring spacers when they did the PDI If you have to tow it the spacers need to be put back in for clearance on the flat bed. Might be causing your tires to rub.
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Old 11-08-2012, 05:05 AM   #4
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Yes the spacers are removed. Just got to either look into fender wells or pull them off again and look.

TY....
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Old 11-08-2012, 05:26 AM   #5
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noisy clutch packs in rear is my guess. Get the fluid changed. How many miles? I changed mine at 1k and it was disgusting. You need the special part # fluid(in owners manual) with GM additive.
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Old 11-08-2012, 05:40 AM   #6
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no rubbing here, suspect just noise you hear from the flooring, which mine do this on the ZL1 and my Avalanche.
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Old 11-08-2012, 06:56 AM   #7
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My tires make a lot of noise when backing slowly.
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Old 11-08-2012, 08:16 AM   #8
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Quote:
Originally Posted by bwolf11 View Post
Does anyone hear some rubbing when making tight turns at slow speeds?

I park in a garage with epoxy floors and mostly notice when making the turn out sounds like tires are rubbing the inner well!

No noise when wheels are straight.
What's probably happening is that the limited slip differential is doing its normal job of trying to keep the two rear tires rolling equally. That will then try to keep the car from turning, and when the front tires are on a relatively slick surface (which I suspect the epoxy surface is), they'll be more likely to be sliding a bit as they roll. As they slip more than just a tiny bit (tight turns), expect some sort of sound to be generated.

When you aren't turning, the LSD isn't trying to slide the front tires at all.


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Old 11-08-2012, 08:17 AM   #9
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No evidence of inner wells showing rubbing. What would clutch packs have to do with it? Never even heard of clutch pack fluid? The noise is coming from the front tire area anyway and only when slow in a turning radius
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Old 11-08-2012, 08:20 AM   #10
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Quote:
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Never even heard of clutch pack fluid?
The clutches they are talking about are in the rear end....
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Old 11-08-2012, 08:21 AM   #11
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Limited slip differentials require a specific "friction modifier" additive to keep the clutch packs that perform the "limited slip" function from chattering as they slip to permit the wheel on the inside of the turn to rotate slower than the wheel on the outside of the turn. But that's more of a "chatter". A rubbing sound is more likely to be the front tires sliding.


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Old 11-08-2012, 08:30 AM   #12
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The slidding part makes sence...ty....will look into changing the fluid you mentioned. 3600 miles!
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Old 11-08-2012, 09:29 AM   #13
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The best thing to do is to get a proper diagnosis at a dealership. Please let us know the outcome.

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Old 11-08-2012, 09:53 AM   #14
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Will do....but I have to get it there to do that....hahah. PIA to make appointment....
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Old 11-08-2012, 10:08 AM   #15
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If the floor is epoxy coated. It will make a lot of noise when the tires are turning on it. Are you sure its not the floor as previously mentioned? The garage floors in my current and previous house are epoxy coated and are noisy when the tires are turned on it. Is the noise there when you turn hard on a non-coated concrete or asphalt surface?
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Old 11-08-2012, 10:30 AM   #16
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The slidding part makes sence...
It is likely impossible to completely eliminate sliding on a non-grippy floor for tight turns. The reasons involve steering and front suspension geometry considerations that are beyond the usual static alignment parameters (camber, caster, toe), and for which no adjustments or corrections exist.


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Old 11-08-2012, 10:35 AM   #17
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I believe it is the same but in the shop on the epoxy floors, its so quite in there i hear everything. Made the appointment to have the fluids checked or changed next week. The Diff fluid.
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Old 11-08-2012, 02:26 PM   #18
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Quote:
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I believe it is the same but in the shop on the epoxy floors, its so quite in there i hear everything. Made the appointment to have the fluids checked or changed next week. The Diff fluid.
Please let us know how your service appointment goes. We are here if you have any concerns.

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Old 11-08-2012, 03:16 PM   #19
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if tires are rubbing on any part of the car, you would easily see rub marks. I doubt highly that tires are rubbing. I have a big garage with granite chips epoxy floor and it sometimes sound like the tires are sliding and not rolling. I love my garage floor.
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Old 11-08-2012, 05:06 PM   #20
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As others have mentioned, this is the differential clutch pack doing its job....at the wrong time. If it happens, it often occurs when cold, on tight corners...#214 had this issue, but as I understand it - not all ZL1s do. Recommend you head to the dealer for a fluid change.

Ask them to check Technical Service Bulletin's and if it is what I think it is, then they'll cover the change under warranty. It's actually not that big of a deal I'm happy to say.
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Old 11-08-2012, 05:49 PM   #21
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...quick note, moving cars around on epoxy floors cause alot of noise and tire chatter from the tire contacting with the floor surface....if your car makes noises outside on road surfaces designed for operating cars on that is another issue.
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