S63 AMG, S63 AMG 4Matic, S65 AMG (W222, V222) 2014 -2021

s65 transmission noise

Old Apr 15, 2017 | 11:01 AM
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s65
s65 transmission noise

in my 2008 S 65 Ihave a soft ie low volume, high pitched transmission noise [ whine] in 3rd gear only, above 1500rpm.not present when car stationary. sounds similar to power steering pump whine but is not related to steering input. immediately stops when decelerating and shifting out of 3rd gear. gear shifts normal. no messages on dash.
Anyone with similar issue. Ideas please. Can't find anything on google search.

BTW i posted this under amg parts by mistake. newbie error. Sorry
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Old May 7, 2017 | 04:07 PM
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Probably the pump on its way out. Not uncommon. You might want to do a transmission service and check to see if TCU (egs53) is working properly. I had them go bad on two different W221s.
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Old May 7, 2017 | 11:03 PM
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transmission noise

Thank you for your reply. It begs the question.
Would a pump failure cause a noise ONLY in 3rd gear.
I should add that I have also noticed a sporadic jerky acceleration in 1st gear from coming off the throttle and then rapidly back on at slow speed.
Your input is much appreciated.
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