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1981 Rear Toe question

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Old Aug 16, 2025 | 03:51 PM
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Default 1981 Rear Toe question

I'm dialing in the rear alignment of my rebuilt stock suspension. I went to a shop for a snap shot of the current alignment.
The toe-in when measuring both sides of the tires is 1/4" exact or .25
LR is .36 - .13 = .23 degrees to move or .094. two thin shims = .06, 3 thin shims = .09
RR is .60 -.13 = .47 degrees to move or .218. 1 thin & 1 thick shim = .17

Question: Do I stay under the .25 (1/4") total stack of shims? (.023) using 2 shims on the LR, or use 3 shims on the LR for a thickness of .26.
I don't want to cause a toe out condition.

Thanks for your help... Yes, I will be addressing the front end next!




Last edited by John Ulrich; Aug 16, 2025 at 04:02 PM.
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Old Aug 16, 2025 | 05:54 PM
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Companies such as Van Steel show 1/8" total for the street.
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Old Aug 16, 2025 | 05:55 PM
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Companies such as Van Steel show 1/8" total for the street. Plus you do camber first than check toe.
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Old Aug 16, 2025 | 09:42 PM
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Agreed, you definitely want some rear toe. But 1/4 seems on the high side. You could run that. But I personally would try to get it closer.
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Old Aug 17, 2025 | 07:20 PM
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Thanks for the "hand holding"!

I dialed out some camber on the right rear and re-stacked the shims and now have the slimmest of Toe-In. I'll wait until I do the front suspension and see what the next alignment printout says to determine which side(s) to remove a thin shim(s)

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Old Aug 17, 2025 | 08:11 PM
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Originally Posted by John Ulrich
Thanks for the "hand holding"!

I dialed out some camber on the right rear and re-stacked the shims and now have the slimmest of Toe-In. I'll wait until I do the front suspension and see what the next alignment printout says to determine which side(s) to remove a thin shim(s)
Why isn't the shop doing the actual alignment?
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Old Aug 18, 2025 | 01:15 PM
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Nailed it, 1/8”. I reduced the shin stack on the drivers side that was a little thick to begin with.

I’m not paying a tech to learn rear alignment 101 on my car. I purchased a lifetime alignment from Firestone 10 years ago. They said they cannot work on the toe. (No one at the time knew what to do)
The front end they can handle. Not being able to stand in the service area and instruct the tech what to do to, if I want my numbers I do it myself.


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