I drive a 2002 vw gti with just over 30, 000 miles on it. It has been taken care of really well (automatic trasmission). One day as I started it up, i heard and felt a grinding or rumbling from beneath the e break as the car was in first gear, and it would stop immediately as it shifted into second. This would go on for 5 minutes of stop and go driving, but after that it would stop. After parking for a couple hours, it would go on again. After about two days of this it stopped however, and now I only hear it every once in a while as i'm driving up a steep seattle hill. Any thoughts?