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  #1  
Old 09-29-2021, 10:32 PM
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Angry Spirited Drive -- Now rear Camber Negative

Alrighty...I went up to the mountains with my maternal side of the family to help spread my grandmother's ashes next to my grandpa's somewhere a several weeks ago. The drive up the mountain has TERRIBLE roads--meaning smooth road with sink-holes completely out of sight. As a result, I hit quite a few rather harshly. Then noticed my steering now pulls more to the right the next day... -_-

Now my rear camber on both axles is noticeably negative. The rear driver side (the one I think I hit the hardest) is the absolute worst negative camber. I can jack up my car on the smooth garage floor and hear the tire adjust quite excessively as the suspension jousts from negative to positive as I jack it up. Then setting it down and rolling it back and forth, it looks like the wheel is about to pop off.


So here's my usual checks I did:

1. Extensively inspected the lower control arm bushings -- both are very tight and appear to not moved since I last had them set -- Just to make sure I took a wrench on it to see if I could get it to shift or move. Nothing. Tight.

2. Attempted to shake the wheel in the air with my hands on the 12-oclock and 6-oclock positions to try and determine if any looseness -- found none

3. I inspected the rear: forward&aft control arm -- joints appears to be tight

4. Looked at the lower ball joint -- I replaced this last year and still looks good.

5. Looked at the integral link...still look good


Question:
Could the rear sub-frame bushings cause a camber issue? I can see extensive cracking of the rubber mount...great.

If something were to bend what could be the culprit? I cant tell if any up of upper control arms bent--they look straight and the rubber bushes look fine.

Could the spring "saddle" break or deteriorate somehow causing it to sit lower? I couldn't find any evidence of this.
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  #2  
Old 09-29-2021, 10:44 PM
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Quote:
Originally Posted by RocketyMan View Post
Alrighty...I went up to the mountains with my maternal side of the family to help spread my grandmother's ashes next to my grandpa's somewhere a several weeks ago. The drive up the mountain has TERRIBLE roads--meaning smooth road with sink-holes completely out of sight. As a result, I hit quite a few rather harshly. Then noticed my steering now pulls more to the right the next day... -_-

Now my rear camber on both axles is noticeably negative. The rear driver side (the one I think I hit the hardest) is the absolute worst negative camber. I can jack up my car on the smooth garage floor and hear the tire adjust quite excessively as the suspension jousts from negative to positive as I jack it up. Then setting it down and rolling it back and forth, it looks like the wheel is about to pop off.


So here's my usual checks I did:

1. Extensively inspected the lower control arm bushings -- both are very tight and appear to not moved since I last had them set -- Just to make sure I took a wrench on it to see if I could get it to shift or move. Nothing. Tight.

2. Attempted to shake the wheel in the air with my hands on the 12-oclock and 6-oclock positions to try and determine if any looseness -- found none

3. I inspected the rear: forward&aft control arm -- joints appears to be tight

4. Looked at the lower ball joint -- I replaced this last year and still looks good.

5. Looked at the integral link...still look good


Question:
Could the rear sub-frame bushings cause a camber issue? I can see extensive cracking of the rubber mount...great.

If something were to bend what could be the culprit? I cant tell if any up of upper control arms bent--they look straight and the rubber bushes look fine.

Could the spring "saddle" break or deteriorate somehow causing it to sit lower? I couldn't find any evidence of this.
could be something bent. I'd take it in for an alignment and see if they can get it into spec. If they can't get the camber into spec in the rear, it's usually the ball joints. The subframe bushing should have nothing to do with alignment. Did you look at the swing arm bushings? How old are they?
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Old 09-29-2021, 11:12 PM
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The usual defects causing sudden change in suspension alignment are usually the wishbone inner side or the rose bushing (ball joint at the bottom).

You will not be able to "wiggle" the tire unless you first remove the spring tension.

https://youtu.be/VYTMJ4qUbFE

This video shows the prime suspect of a quick change in toe or camber.
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Old 09-29-2021, 11:13 PM
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The subframe is one big piece. If it shifts it would just make the car crab durn the road not affect camber


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Old 09-29-2021, 11:14 PM
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Originally Posted by Fifty150hs View Post
could be something bent. I'd take it in for an alignment and see if they can get it into spec. If they can't get the camber into spec in the rear, it's usually the ball joints. The subframe bushing should have nothing to do with alignment. Did you look at the swing arm bushings? How old are they?
The lower control arm bushings are about 1 year old. They're urethane.
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Old 09-29-2021, 11:15 PM
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They also won't affect camber in any meaningful way.


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Old 09-30-2021, 12:06 AM
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Would blowing the rear shocks and/or the rear strut mounts tearing through cause the suspension to sag? Notice any fluid leaking from the rear shocks? In my head without aid from the rear shocks the truck would squat on the springs and cause negative camber.
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Old 09-30-2021, 12:27 AM
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Quote:
Originally Posted by andrewwynn View Post
The usual defects causing sudden change in suspension alignment are usually the wishbone inner side or the rose bushing (ball joint at the bottom).

You will not be able to "wiggle" the tire unless you first remove the spring tension.

https://youtu.be/VYTMJ4qUbFE

This video shows the prime suspect of a quick change in toe or camber.
I replaced the ball joint last year with a delphi as well as the the integral link that goes along with it.

Tomorrow I'll try jacking up the control arm a little bit to see if I can take off pressure and feel for any play.
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Old 09-30-2021, 12:32 AM
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Originally Posted by crystalworks View Post
Would blowing the rear shocks and/or the rear strut mounts tearing through cause the suspension to sag? Notice any fluid leaking from the rear shocks? In my head without aid from the rear shocks the truck would squat on the springs and cause negative camber.
No, I don't notice and misting or leaks from the rear shocks. What I do notice is some fresh looking rust on the inside of the rotor. I would think a wheel bearing would be very noticeable. I can take off the rotor tomorrow and have a looksie.

On the picture, you can see the upper portion of the inner fender liner where the tire rubbed on the hard bump. You can also see on the inside of the rotor shield some fresh looking rust...I never seen it before.

My springs there I also checked to see if any of the coils broke and couldn't see anything broke.
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Old 09-30-2021, 10:11 AM
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Originally Posted by RocketyMan View Post
No, I don't notice and misting or leaks from the rear shocks. What I do notice is some fresh looking rust on the inside of the rotor. I would think a wheel bearing would be very noticeable. I can take off the rotor tomorrow and have a looksie.

On the picture, you can see the upper portion of the inner fender liner where the tire rubbed on the hard bump. You can also see on the inside of the rotor shield some fresh looking rust...I never seen it before.

My springs there I also checked to see if any of the coils broke and couldn't see anything broke.
How much did you lower your truck with the lowering springs? I put coilovers on mine and lowered it 2". With that much drop I had to replace both control arms with adjustable ones to be able to get the alignment into spec.
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