: hi,,, today the middle of my car between the driver and passenger in da front starrted knocking.... noo...startted banging like it was falling apart when i accelerated out of no where.. what is that the differential.?... i know when i bought it the owner said it had a few teeth missing.... i mean the whole car vibrated like something was broken or not working...and not a little vibrate i'm talking like a earthquake inside my car.. i'm assuming it's the differential any ideas.. in the middle of the car like someone was swinging a bat as hard as they could underneath my car... i have it in a garage.... but wanna search for the part if i can get if for cheap.. thanks.... kam... 86 325 e