Need to shift rearend over 1/2"

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Old May 29, 2022 | 08:49 PM
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Need to shift rearend over 1/2"

Hi All

I just bought a 1972 olds cutlass.

It has a 10 bolt rear with a pretty heavy duty sway bar.

I noticed the rear seems to be pushed over a bit.

I was wondering how do you adjust it back to center?

Thank you for your help.
Old May 29, 2022 | 08:51 PM
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Old May 29, 2022 | 09:43 PM
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It's probably not the rear that's shifted over, it's the body.
Old May 29, 2022 | 09:44 PM
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Before you begin considering a shift of 1/2” (or any length) is supposedly required, how did you determine this? Examine the lower control arms - they need to be of the “boxed” variety - not the open control arm variety. If you’re using the sway bar as a “gauge” from which you’re measuring distances, remove the sway bar completely and take new measurements. What are the conditions of the upper and lower control arms are they bent, show damage? If you are using the sway bar as a gauge to measure distance, as stated remove it and see if you come up with the same “seemingly” 1/2” disparity.
Old May 29, 2022 | 09:46 PM
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As Eric suggested, as well. If you have no driving handling issues, 1/2” is almost negligible.
Old May 30, 2022 | 04:52 AM
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Originally Posted by oldcutlass
It's probably not the rear that's shifted over, it's the body.
The more I read about this, the more I realized this is probably the case. The body mounts have been changed, so this does make sense.

I will have to put it up on stands and take a better (proper) look at this.

Thank you for taking the time and responding to my question.

Last edited by romanss; May 30, 2022 at 04:55 AM.
Old May 30, 2022 | 04:55 AM
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Originally Posted by Vintage Chief
Before you begin considering a shift of 1/2” (or any length) is supposedly required, how did you determine this? Examine the lower control arms - they need to be of the “boxed” variety - not the open control arm variety. If you’re using the sway bar as a “gauge” from which you’re measuring distances, remove the sway bar completely and take new measurements. What are the conditions of the upper and lower control arms are they bent, show damage? If you are using the sway bar as a gauge to measure distance, as stated remove it and see if you come up with the same “seemingly” 1/2” disparity.
I determined it, just by looking at the body how far it hangs past the wheel one side compared to the other. I now realize this was the wrong assumption. I will have to look at this a bit more thoroughly.

Thank you for taking the time and responding to my question.
Old May 30, 2022 | 05:48 AM
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Nice looking car!
Steve
Old May 30, 2022 | 06:32 AM
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1/2" of offset is well within factory assembly tolerances. The wheel wells are designed to provide clearance for worst-case mass production tolerance stackups with stock tire sizes. The problem comes when someone installs tires that are wider than stock.
Old May 30, 2022 | 06:47 AM
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Originally Posted by joe_padavano
1/2" of offset is well within factory assembly tolerances. The wheel wells are designed to provide clearance for worst-case mass production tolerance stackups with stock tire sizes. The problem comes when someone installs tires that are wider than stock.
Well, thats the exact reason why I started looking at it. Lol.

No problem. I'll just have to invest some time and get it straightened out.

Thanks
Old May 30, 2022 | 06:51 AM
  #11  
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Originally Posted by romanss
Well, thats the exact reason why I started looking at it. Lol.
That was obvious from the photos.
Old May 30, 2022 | 08:41 AM
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Once you establish that it is in fact the body, the fix is very easy. Just loosen all the body bushing bolts from the cowl back and shift the body back into the correct position. It can be done on jack stands, but much easier on a lift.
Old May 30, 2022 | 01:28 PM
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Originally Posted by oldcutlass
Once you establish that it is in fact the body, the fix is very easy. Just loosen all the body bushing bolts from the cowl back and shift the body back into the correct position. It can be done on jack stands, but much easier on a lift.
Since you guys are the experts....


Now that I have all the body mounts loose. What is the best technique to move the body?
Old May 30, 2022 | 01:34 PM
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Originally Posted by romanss
Since you guys are the experts....


Now that I have all the body mounts loose. What is the best technique to move the body?
I didn't mean that to sound smart ***. I have never done this. I figured id used a come along.

Old May 30, 2022 | 02:58 PM
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A couple of pry bars, there are holes in the frame for this purpose.
Old May 30, 2022 | 08:42 PM
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This seems to be a common problem, my 70S is about 3/4" to the driver's side. As said, it is the body, not the rear itself. Be thankful the body mounts were recently changed, the bolts on mine are 52 years old. I have strong feeling some would snap off.
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