02 WRX, new clutch and flywheel, full exhaust and intake, stock everything else
The sound seems to be coming from the tranny, but I could be wrong. There are only two driving situations that makes it happen:
1) engine braking with RPM's higher than 2000 with the majority in the 2000 to 3000 range. Once it drops below 2000, it goes away.
2) barely on the gas, no acceleration in the same RPM range
As soon as I add in any accelleration, whether it be very easy, or going full out, the sound goes away. All gears feel fine. Shifts great, and it stays in whatever gear I put it in. I changed the fluid in both diffs...no shavings.