Ok, for the past year or so iv had this horriable grinding/rumbling noise when i accelerate. I had it looked at and i was told my rear had lost its fluid and the gears has stripped and gone bad. It was refilled with fluid and the problem still persisted. I had my clutch done this past weekend and oddly enough the noise has stopped. I get a nice smooth quiet ride up until about 50 when the car starts to vibrate alot. So im guessing perhaps something was loose in the mounts or driveshaft. So should i still get a new rear? And what could be causing the new vibration?