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Old 03-29-2020, 06:32 PM   #1
Scooby Newbie
Member#: 510454
Join Date: Jan 2020
Default Grinding/rattling sound coming from near transmission

Hello all. Ive scoured the forums for a couple days trying to find the answer to where my grinding/rattling sound is coming from. The closest Ive come across is maybe a bad center dif.

I have a 2004 WRX. Only mods are a Perrin flywheel (the crankshaft pulley whatever its called), COBB turbo back exhaust, stage 2 accessport and air oil separator.

Heres the order of what happened and the problem:
-Was sitting in the drive thru of Arbys last week and the alternator belt started squeaking. Crap, it must have been loose after i replaced it the week before, so I tightened it and the squeak went away.
-On the drive home there was a very loud grind/rattle coming from underneath the car, right near the back of the transmission and seemed like it was just off center towards the passenger side. It happens during decel, when the clutch is pushed in and under light acceleration (like cruising down the road). It goes away under heavy acceleration and is only really noticeable between 2k-4k RPMS.

Ive tightened down the exhaust and every other bolt under the car and its still there and driving me crazy.

Heres a video that helps show how it sounds. You can hear it best at 0:25 seconds in.
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