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79 Camaro Front Suspension Issue

 
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Hot_Rod_Mike
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Joined: 27 Nov 2005
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Location: Lawtey, Fl
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1972 Chevrolet Nova

PostPosted: Sun Dec 17, 2006 8:52 am    Post subject: 79 Camaro Front Suspension Issue Reply with quote

I parked the Nova for a while and purchased a 79 Camaro. I have been working like crazy on the thing, replacing every thing that I could find wrong with it. My problem is this, (maybe its not a problem), I have a caster\camber gauge and set the front alignment to specs. This was after I replaced ball joints, idler arm, and control arm bushings etc. When I drive the car forward and stop,everything looks great. If I back the car up, say 5 feet or so, then stop, the front tires are leaning in at the top, this just doesn't seem right to me. I didn't think the camber would move like that unless some thing was bad on the suspension, but I sure cant find what it is. Maybe I am just over looking something, so any advice would be appreciated!
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Mike F.
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jeep_406
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1972 Chevrolet Nova

PostPosted: Sun Dec 17, 2006 8:58 am    Post subject: Reply with quote

Are the control arm bushings toast?
Shims in the upper control arm shaft didn't fall out did they?
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Hot_Rod_Mike
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Joined: 27 Nov 2005
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1972 Chevrolet Nova

PostPosted: Sun Dec 17, 2006 9:35 am    Post subject: Reply with quote

Bushings were all replaced, shims are good and tight, I'm pulling my hair out here!
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Big Dave
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PostPosted: Sun Dec 17, 2006 10:48 am    Post subject: Reply with quote

That sounds like control arm bushings. Were the holes in the chassis rusted out? (enlarged allowing the bottom arms to move?) It seems centered around there some how.

May be time to mount a video camera in the engine compartment to record what is going on. (weld a 1/4-20 bolt to a C-clamp to use as a tripod and mount it some where you can see what is going on.)

You could drive around and see if anything else is hapening beside camber changes. (does it effect toe-in?)

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af2
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1933 Willys Coupe

PostPosted: Sun Dec 17, 2006 12:55 pm    Post subject: Reply with quote

Before anything else I would measure the front end height when you stop going forward then the same when you stop going backward and see if the height changes. 1" will change the camber a bunch.
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disturbthepeace1
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Joined: 14 Jun 2003
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Location: Stanton, CA
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1965 Volkswagen Beetle

PostPosted: Sun Dec 17, 2006 2:10 pm    Post subject: Reply with quote

Just a added note:

the wheel bearing in a 79 amaro is slighty smaller the a 78 and earlier. I found this out when a replaced mine and found that some idiot of a previous owner installed a 79 spindel on my 78.. If you put the larger bearing on a 79 spindal will make the camber out of wack.. a mistake by you local parts geesh and you could be just a frustrated as I was.......

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Knarley Darley
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PostPosted: Sun Dec 17, 2006 4:31 pm    Post subject: Reply with quote

Check the toe in. It will do that if it has toe in and you back up
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beersngars
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1948 Chevrolet Coupe

PostPosted: Sun Dec 17, 2006 10:10 pm    Post subject: Reply with quote

Knarley Darley wrote:
Check the toe in. It will do that if it has toe in and you back up


Thats what I'm thinking too.
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Hot_Rod_Mike
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Joined: 27 Nov 2005
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1972 Chevrolet Nova

PostPosted: Mon Dec 18, 2006 6:25 am    Post subject: Reply with quote

Thanks for the brain storming, I will make sure and check all those items. The car went to the paint shop yesterday, I should have it back by this coming weekend.
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Brutisgearhead
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1974 Chevrolet Monza

PostPosted: Mon Dec 18, 2006 10:00 am    Post subject: Reply with quote

I have the same problem with my 408 sbc vega. The front end has been completly rebuilt , everything is tight, to get the tires back strait I jack the front tires off the groung and sit it back down, but I still need to find the problem. The tires stay strait as long as I do not back up. I wonder if maybe I cut too much coil spring off to get the ride height I wanted, and the geometry is out of wack now?. I never noticed this problem till I put the engine in. it does well at the track so I dont really know, hope to solve this winter.
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Hot_Rod_Mike
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Joined: 27 Nov 2005
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Location: Lawtey, Fl
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1972 Chevrolet Nova

PostPosted: Fri Feb 16, 2007 9:06 am    Post subject: Reply with quote

Just a quick follow-up on this. The problem was the toe setting!! It was so far off that it affected the camber, depending on whether you were going forward or backward. I set the toe, then had to reset the camber and everything is perfect now.
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