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2010 Chevrolet Impala - Rumbles

I have a 2010 Impala with 108,000 miles on it. When i accelerate fast from a stop there is a noise that sounds like you’re going over a rumble strip that comes from the rear of the car. If I accelerate slowly it does not happen. I had my mechanic listen an he thought it may be coming from the transmission. He took a look inside the transmission and other than a few shavings, which he said was normal, he did not see anything out of line. The first i noticed this was about 6 months ago. It never happens for my wife because she drives more conservative than I do. We have had no other problems with the car and it has been a very good, reliable car. I had no plans to look for a car immediately but i was wondering if I should.Thanks for listening. Steve in Ohio

Should check motor and transmission mounts.

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Also check the exhaust mounts. If the muffler or pipes have sagged, they may be close enough to rattle on hard acceleration.

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