Ok this is a new one so ill try to explain it and see if someone else has experienced it! Its has happened twice so far! It feels like the ring and pinnion gear "misses" a mesh or two there is no sound or anything just the rear end acts like someone just gave it 3 or 4 good jerks and then its all normal again kinda like something wanting to hold it back! The first time i was going very slow and the second time around 40 mph. Now this is with 3600 miles on the car! Man i wish i could explain it better its like the rear end just skips kinda like running over rumble strips on the edge of the road. well anyway if someone else has noticed it I sure would like to know! Man I tell you its one thing and another with this car! Power window motor went out at 3000 miles ! Thanx Havgun #1676 At least that is what my sticker use to have on it!