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Noise on deceleration

alstarz88
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alstarz88 Member

alstarz88

Posted
Posted

HI

I have a boxster thast I have upgraded the engine and all rear suspension components and a 6 speed box everything is working fine except for a growling noise on deceleration only when left in gear i.e. using the engine to break and most noticeable in 1st 2nd and at higher revs 4k+ to replicate the noise.

I have checked engine mount and whilst mine had split I have replaced it but has not had a effect

Anyone got any ideas.

P.S the gearbox oil i used was 75w90 semi synthetic alot of web searches suggest using MT-90 but i am not convinced the oil can make that much difference

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JFP in PA Member

JFP in PA

Posted
  • Moderators
Posted

Get rid of the gear oil and refill with the OEM product; it is a unique full synthetic gear lube produced for only for Porsche. We get cars in regularly with gearbox noise issues that are traced back to using the wrong lube.

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