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Old 03-11-2009, 11:12 AM
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Bump steer?

I have a 62 impala with a 78 camaro clip in the front. I have an issue when hitting bumps in the road where it feels like the front tires are either toeing in or out. It feels like the front of the car dives and brakes are on. I had it at stock spring height and now with one coil cut out. It did it then but is worse now. I think it has too much toe in and bumps agrevate it.

Other thoughts?

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Old 03-12-2009, 10:37 AM
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Sounds more like a loose idler arm, any extra up and down movement there affects toe-in. Or could be a loose centerlink or even tie rod end.
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Old 03-12-2009, 11:30 AM
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To test for bump steer : take the springs out. Do a toe check at ride height, and lower the car with a floor jack, check the toe again. There should be only slight change, aprox. 1/8?. It will never stay the exact same toe, to many things going on.
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Old 03-12-2009, 12:19 PM
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Here is a good article on bump steer.

Vince
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Old 03-12-2009, 06:54 PM
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I'd like to add that you need to be certain that the front end parts (center link, idler arm and Pittman arm) are compatible with each other.

There were minor- but important- differences between years and between P/S or non-P/S equipped Camaros through the years, even though the parts appear to fit correctly.
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Old 03-20-2009, 01:32 PM
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GMC Guy

I have to agree with chiefrtain. The idler and pitman
arms must be in very good shape to avoid bump-
steer or steer change when stopping, from a foreward
motion or from a rearward motion. Also be sure that
the idler arm mounting bracket is not bent where it
attaches to the frame. The center link must be
perfectly level with the ground. And while you are
under there, be sure that each tie rod assembly is
running from the center link to the steering arms
at the same angle. Let us know what you find,
and good luck...
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