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Thumping Ride at High Speed...

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Old Jan 19, 2007 | 07:53 AM
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Default Thumping Ride at High Speed...

Has been a problem for a while now. It shows in the steering wheel at speeds above 70 mph. Have replaced both front wheels and tires. Have had them off and on so much from balancing attempts that I can't wait to replace the banged up lugs when it's all fixed (if ever).
Can anyone suggest an approach to this problem or have seen it.
Signed,
PO'd in Houston.
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Old Jan 19, 2007 | 08:33 AM
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Loose Shock?
Perhaps a flat spot on the Front Wheel Bearing?
Is it occasional or is it constant.
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Old Jan 19, 2007 | 08:38 AM
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More details, please.
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Old Jan 19, 2007 | 09:04 AM
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Constant. Was balanced out by Discount Tire when I got new wheels over a year or two ago. Since I got new tires all around (pardon the pun) just haven't been able to shake it.
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Old Jan 19, 2007 | 09:07 AM
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Originally Posted by R Devil
More details, please.
Oh yeah on the more info, 1999 at 60k miles.
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Old Jan 19, 2007 | 09:15 AM
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I assume you've checked alignment. Wheel play?
Nothing against Discount, but a decent tire shop will find the answer.
Even if it's not the one you want to hear. Try another shop.
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Old Jan 19, 2007 | 09:27 AM
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Borrowed a friends 99' and placed his front wheels onto mine with the same results. Did not check allignment or for loose shocks; I will ASAP (great suggestions).
Have been to Corvettes of Houston and Discount Tire for balance; got sucky results from both. They both changed the point at which the shaking occurred.
Was so frustrated was thinking bout' starting my own tire shop. Still may.
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Old Jan 19, 2007 | 09:28 AM
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And there was no wheel play.
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Old Jan 19, 2007 | 11:24 AM
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Originally Posted by gimme5
Borrowed a friends 99' and placed his front wheels onto mine with the same results. Did not check allignment or for loose shocks; I will ASAP (great suggestions).
Have been to Corvettes of Houston and Discount Tire for balance; got sucky results from both. They both changed the point at which the shaking occurred.
Was so frustrated was thinking bout' starting my own tire shop. Still may.
I've been working with similar vibration problems-start with, road forced balance, checking run out of tire and wheels. Then allignment and shocks, and then the bearings. When you do a road force balance, do all four as it is possible the vibration may be from the rear also?
Additional info is helpful;
Type/brand tire
Wheel/stock or aftermarket
mileage/abuse car has been subjected to-

Good luck- keep us posted
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Old Jan 19, 2007 | 12:17 PM
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Gimme5,
My neighbor had a similar problem with her 2000 Coupe. It was more of a shimmy than a thump at 70+mph. Her car ended up needing brake work.
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Old Jan 19, 2007 | 03:13 PM
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Would love to give it to someone and just say to 'em "Fix it and how much do I owe you?"

Have spent much time on this prob and am a little tired of it. I just want to drive it; not the biggest self-repair-job fan.

Great site. Thanx for the input. Will be my last stab at it using the new input today.

It maybe time to get that black Mercedes that I've been thinking bout'.

Hope not.

Preciate you folks.
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Old Jan 19, 2007 | 03:17 PM
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Oh yeah, Burgie:
Additional info is helpful;
Type/brand tire ; Standard Eagle F1's (factory spec)
Wheel/stock or aftermarket (aftermarket Z06/chrome; have replaced both front wheels and tires)
mileage/abuse car has been subjected to- 60k miles w/ less than standard amount of abuse
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Old Jan 19, 2007 | 03:22 PM
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Originally Posted by gimme5
Constant. Was balanced out by Discount Tire when I got new wheels over a year or two ago. Since I got new tires all around (pardon the pun) just haven't been able to shake it.
Based on your comment, it's a tire problem. I'm guessing an out of round issue not a blanace issue. No amount of balancing will offset an egg shaped assembly.

Go to a reputable dealer and ask them to check each assembly with a radial run-out gauge. When you find the culprit, try rotating the tire 180 degrees on the wheel. If that doesn't work, ask for an adjustment and get a new tire.
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Old Jan 19, 2007 | 03:42 PM
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I had something like this but it was coming from the rear. There was some wheel hop going on... caused by a rim that wasn't completely round.
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