also another thing i have noticed, is that in the morning when i am leaving for work i put it in reverse and back out of my driveway. after coming to a complete stop i put it in drive and accelerate for a few seconds and then i hear a short grinding noise that lasts about a second or two and i can feel it rumble the gas pedal also, all while i am accelerating. then it wont do it anymore till the next day. i guess it has to set for a while or something?

anyone else having this problem?