I've got about 12,700 Miles on a 2009 WRX. Been doing some highway driving the last 2 months 70miles a day.
Lately I've started feeling a lot engine vibration and "lag" or hesitation from the transmission. Engine noise has even gotten louder even at 2500rpm. Even at low speeds around 40mph the car does not feel like it's keeping a steady pace (a bit jittery). It doesn't feel as smooth a ride.
The clutch also doesn't engage as smooth at 2000rpm.
Took it in to the dealer for the 11k oil change and they tell me nothing's wrong.
Been using regular oil instead of synthetic. Could this be the problem?
Is this normal wear on the 2009 WRX?
Does wear on the clutch cause damage to the transmission?
Has anyone had similar problems on an 09 or am I going crazy?
Have there been any threads on tranny problems?