I would lean more toward warped brake rotors. Have you ever driven through
a puddle after driving for a while? If so the rotors heat up and when hot
metal gets slpashed with cold water all kinds of unintended magic appears.
Repairing this problem could mean new rotors. Try having them 'trued' and
see if this makes any positive change.
I'd put 90 to 1 odds on warped brake rotors (probably front brake
rotors). Its a cheap and easy fix... You can have them turned (i.e.,
ground back into spec) for about $10.00 per rotor (i.e., per tire) or
you can buy new ones at autozone for about $25.00 per wheel. Another
option would be to order a set of drilled performance rotors off ebay
or Summit racing for about $140.00 for all 4 wheels. But id say it
does sound like a warped brake rotor.
Another point to remember, is throw something hard and heavy and anyone
who puts your wheels back on and doesn't use a torque wrench. That will
cause them to warp every time (and even if done right they still might).
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