confused/concerned..any ideas?

mtnjam

New Member
Joined
May 24, 2007
Location
nc
I have a 01 Grand with an interesting problem. A local, trusted service station rotated my tires for me two days ago and after running a Road Force test to measure the wheel/tire runout, they said one tire (or wheel) was measuring out of round. They put the tire left front and immediately I was noticing slight wobble at 46-49 mph and SEVERE WOBBLE/SHAKING whenever I hit the brakes at 55-60 mph. I had them immediately take the tire off and test just the wheel. It was showing up as "out of round" or extreme runout too.

THIS WAS NOT AN EXISTING, NOTICED PROBLEM PRIOR TO TWO DAYS AGO.

Any ideas?

I have recently (4 months) replaced the rotors and pads and they still "look" fine (haven't had them turned yet)
I have not upgraded anything up front other than replacing the stock steering stabilizer with an Old Man Emu one.
I'm not noticing any play in the steering and alignment is perfect.

When I say severe wobble when breaking at 55-60...i mean SEVERE. When I begin to brake and the wobble/shaking starts, it will continue for a couple seconds after letting off of the brake, which seems to tell me its not a rotor problem?!

Anyway, any ideas would be great. Thanks y'all
 
Why the H did they put an out of round assembly on the FRONT?! Rotate or not you don't do that. Odds are the wheel was bent prior to the rotation. Time to find a scrap yard that has them. If they did a road force and found the wheel out of round did they OEM match the wheel and the rim to at least minimize shimmy?
 
Put the out of round wheel on the back and see what happens.

If you need a wheel, Galloways has a bunch of stock GC alloy wheels.
 
sounds like they warped the rotor with a swift twitch of the impact, balance it, and put it on the back see if it still shakes when you hit the brake.
 
Out for round on the rear is not noticeable. Do you remember hitting a curb or pothole with the rear in the past? Also, make sure they use a torque wrench on the lugs else they aren't as trusted as you say.
 
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