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Rubbing issues...

Roy Hutchinson
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Roy Hutchinson Enthusiast

Roy Hutchinson

Posted
Posted

Guys...need some info please. I recently purchased a 2020 Silverado RST Z71. The dealer installed the 2.5 inch Trail Boss lift along with 35x12.5x22 tires. The wheels are OEM with a +28 offset. As you can imagine there is some rubbing. Initially I thought the rubbing was from the inner wheel well liners but it turns out to be the upper control arms. Now, I've contacted the dealer Service Manger and he thinks the fix would be adding a 1.5 to 2 inch level kit above the already 2.5 inch suspension lift that's on there. The truck sits with a rake so adding the level would fix that but will it fix the upper arm rubbing issue. Appreciate any info. This is the first truck that I've ever owned with anything higher than a level kit. Any info would be appreciated.  

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Ryguy Enthusiast

Ryguy

Posted
Posted (edited)

Those guys are trying to take your money. All you have to do is add a set of hub centric wheel spacers maybe 1/2” and you’re good. Adding more lift to the front end is not going to fix your tire rubbing on the UCA. 

Edited by Ryguy
  • Sad 1
JSW74 Enthusiast

JSW74

Posted
Posted
5 hours ago, Ryguy said:

Those guys are trying to take your money. All you have to do is add a set of hub centric wheel spacers maybe 1/2” and you’re good. Adding more lift to the front end is not going to fix your tire rubbing on the UCA. 

Couldn't agree more. A small wheel spacer will fix the rubbing on the UCA! Post more pics of the truck. Happy to see someone running 35s leveled.

Flatblack83 Enthusiast

Flatblack83

Posted
Posted (edited)

Not sure how much it rubs but mine rubbed with 295s, I used a 1/4 inch spacer so the factory wheel studs were long enough without any problems. I don't think 1/2 inch will make it safely without longer studs. You should have atleast 5 at minimum full turns of threads with the nut.

 

I think this problem in your case is why you see guys running the 35 11.50s.

Edited by Flatblack83
  • 2 weeks later...
Roy Hutchinson Enthusiast

Roy Hutchinson

Posted
  • Author
Posted

Thanks guys. I do appreciate everyone's advice. I definitely looked into adding spacers however,  I decided to call the dealer and I told them to fix the rubbing issue at no cost to me. They installed the 2 inch level and it fully eliminated the rubbing issue on the UCA...I still have very minimal rub on the mud flaps but that's an easy fix. I guess 35x12.5s will work on stock 22" wheels with less than a 6inch lift. I feel much better now than a week ago..lol thanks guys...

On 4/25/2020 at 8:54 AM, Flatblack83 said:

Not sure how much it rubs but mine rubbed with 295s, I used a 1/4 inch spacer so the factory wheel studs were long enough without any problems. I don't think 1/2 inch will make it safely without longer studs. You should have atleast 5 at minimum full turns of threads with the nut.

 

I think this problem in your case is why you see guys running the 35 11.50s.

 

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Roy Hutchinson Enthusiast

Roy Hutchinson

Posted
  • Author
Posted
On 5/3/2020 at 10:25 AM, Silverado4x4 said:

So now you have a 4.5 leveling kit? Man I would love to see pictures of the CV axle angles. I bet there not going to last long.

I would agree the CV axle angles are not ideal however, all work was performed by the Chevrolet dealer. Its something I'm going to watch very closely and if i start experiencing issues you can rest assured they will be making repairs at no cost to me...

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BlackRST Enthusiast

BlackRST

Posted
Posted
17 hours ago, Roy Hutchinson said:

I would agree the CV axle angles are not ideal however, all work was performed by the Chevrolet dealer. Its something I'm going to watch very closely and if i start experiencing issues you can rest assured they will be making repairs at no cost to me...

20200508_124643.aaaaaaajpg.jpg

eeek....thats a bit cringe worthy, or at least the angle of the photo makes it. Good call on the dealer install aspect. 

Silverado4x4 Senior Enthusiast

Silverado4x4

Posted
Posted

Yeah I don't like that angle at all, worse when you go to full lock on the steering for the lower boot. The failure will be the boot at the front diff. how its pretty much fully extended at the top. But yes keep an eye out on them if they start slinging grease there done or if you feel or hear a popping noise when making a sharp turn.

  • 1 year later...
Danny CR New Member

Danny CR

Posted
Posted

I had this issue on my 2020 RST. I have a 3.5 inch rough country lift, with 33’s open country r/t. I went with a spacer for now. Im still wondering if getting a higher suspension lift would eliminate the inner tire from rubbing with the inner control arm?

lapoolboy Senior Enthusiast

lapoolboy

Posted
Posted

So essentially they added a level kit to the OEM Trailboss 2" lift they installed originally?  Hopefully, the level kit they used is TB/AT4 specific which generally include UCAs...which kit did they use?

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      Spent the last hour or 2 googling and reading up on the spacer thing. I don't like the loss of thread contact on the slip on spacers, but it appears you can get "extended" lug nuts that reach into the hole of the wheel to get back the lost threads. Looks like the only true hubcentric slip on spacers are at least .375". I'd want as little as I could get away with and don't want to cause other clearance issues going any thicker. Bora seems to offer what appears to be a well made .375" spacer and extended lug nuts. I searched here and did find a couple threads recommending Bora. But not cheap. By the time I buy spacers and lugs, new TPMS sensors, then pay a tire shop to install the new sensors, I suspect I'm going to be in over $400. Thinking about running out and getting some washers to put behind the wheel to see if .375" is enough to clear calipers, turn lock to lock without rubbing, and to see if the wheels/tires look strange pushed out a little. This would just be to check fitment.
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