Originally Posted by Lachlan Cumming
Hi, I just bought my parents old Subaru Outback 2000 4cyl manual. Having never driven manual before I was very hard on the clutch and stalled multiple times. Dad drove the car back home and we noticed a vibrating noise coming from the front of the car when decelerating(sounded like it was coming from near the gearstick). The noise seems to stop when the clutch is pressed in. Any ideas what might be causing this?
There's a clear causal connection between the transmission being engaged with the engine and the vibrating noise: what you should identify is if it is only tied to engine RPM (check this by revving engine high enough and sustaining it for a few seconds) or if it requires the transmission being engaged.
If it does not require being in gear, it's likely one or more motor mounts: a good check there is to rev the engine while in neutral with emergency rake on with hood up and see if the engine rotates when you do it.
Now, if it requires being in gear, see if there's an RPM connection, as that may be useful.
I've not heard of this, but if you've been rough on the clutch, for all I know, you've taken a divet out of the clutch (if the clutch is as old as the car, it may be brittle) or you may have chipped some teeth off of gears, or damaged something else. Torquing things hard by dropping into gear and stalling with sufficient power can cause all sorts of things to break, including stuff in transaxles: you may have something very expensive to fix. Until you isolate if it's the engine or the transmission or some combination, it's hard to guess more accurately.
Note: I'm not an auto mechanic for a living, but I've had some interesting experiences personally and otherwise to base things off of.
Anyone else able to add to this, or rule out one or more of these things?