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Q:

I have a thomping, pinging noise when I drive. It stops when I do. What is it? on 2002 Chevrolet Tahoe

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This does not happen in reverse. on the inside it sounds like a bumping noise.
(2) Answers
What conditions cause the noise? anytime it's in drive and rolling forward? Only at certain speeds? under light/hard accelleration? Does the thumping speed increase with wheel speed,engine speed , or change at all with gear changes? Turning have any effect on the severity of it?Any other things you can think of that cause the sound to change? Let us know , maybe we can be of more assistance.