Rear tire slam
09-09-2010, 10:24 PM
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Car: '83 Berlinetta
Engine: 383 CI
Transmission: T56
Axle/Gears: 3.73, Eibachs, Tokiko Illuminas,
Rear tire slam
I've had a problem for while with the rear pass side tire "slamming" as i go over uneven ground - like a blown shock. While driving over seams in the road at speed it's fine. But if I go over a bump or pot hole in a parking lot the right rear bangs like it's not following the road.
My Tokico's seemed fine but I put in a pair of new Sensitracs to be sure. No difference. So I started to wonder if I've got some binding of some sort as the rear axle moves.
I had a really beefy sway bar at the back which I've removed for the moment. Seems to help a bit - like the noise only happens on the more exagerated bumps now (I think, could be in my head...).
I have been running Eiback Sport lines for a couple of years but recently reinstalled the rear stock springs - nearly new - no sag at all. I'm still running with the lowered front end.
I have an adjustable torque arm from Spohn which is currently set up for a 'true' pinion angle of '0'.
That's all I can think of for info. Any ideas?
Thanks,
Jon
My Tokico's seemed fine but I put in a pair of new Sensitracs to be sure. No difference. So I started to wonder if I've got some binding of some sort as the rear axle moves.
I had a really beefy sway bar at the back which I've removed for the moment. Seems to help a bit - like the noise only happens on the more exagerated bumps now (I think, could be in my head...).
I have been running Eiback Sport lines for a couple of years but recently reinstalled the rear stock springs - nearly new - no sag at all. I'm still running with the lowered front end.
I have an adjustable torque arm from Spohn which is currently set up for a 'true' pinion angle of '0'.
That's all I can think of for info. Any ideas?
Thanks,
Jon
09-12-2010, 12:33 PM
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Re: Rear tire slam
Could it be the exhaust pipe hitting the axle due to worn out or broken hangers? Cause I would think the axle tube would smack the exhaust pipe before the tire could smack the inner fender.
09-13-2010, 01:37 PM
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Car: '83 Berlinetta
Engine: 383 CI
Transmission: T56
Axle/Gears: 3.73, Eibachs, Tokiko Illuminas,
Re: Rear tire slam
Thanks for the reponse.
Nope, the exhaust is fairly recent and all good and solid. If both back wheels go over a bump at the same time it's fine. It is worst when one wheel is on flat ground and the other goes over a bump or into a pot hole.
I'm running Lakewood LCAs with poly bushings and the SPOHN cross member mounted torque arm. I'm wondering if this combo doesn't leave enough movement in the LCAs resulting in binding (I would have thought that this would be more of a problem in a corner than a straight line but I'm no expert).
I'm going to call Spohn today and see if their Delsphere ended LCAs might help.
Jon
Nope, the exhaust is fairly recent and all good and solid. If both back wheels go over a bump at the same time it's fine. It is worst when one wheel is on flat ground and the other goes over a bump or into a pot hole.
I'm running Lakewood LCAs with poly bushings and the SPOHN cross member mounted torque arm. I'm wondering if this combo doesn't leave enough movement in the LCAs resulting in binding (I would have thought that this would be more of a problem in a corner than a straight line but I'm no expert).
I'm going to call Spohn today and see if their Delsphere ended LCAs might help.
Jon
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