Tom Bradley
| Joined: | 07-15-2013 |
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| Posts: | 205 |
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Sounds like something loosening up and resonating, though exactly what is a puzzle. I do not hear any high frequency clanks like I would if it were two pieces of bare metal. So I think it would be something that is buffered with oil or grease lubricant, gasket material or rubber. Since the frequency is so low, I would expect it to be something fairly large or heavy. Possibly the exhaust system is heating something nearby, such as the transmission rear mount? I think you will have to get under the car to see if you can locate the source of the sound more exactly. It is also possible that the higher frequency sounds are getting absorbed by the carpeting and undercoat and it will sound different from underneath.
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