my ranger started making this wierd grinding noise a few weeks ago and i couldnt place where is was coming from, i originally thought it was the rear drums since i havent had to service them since i bought my truck, but i couldnt find the problem with the truck parked so i put it up on blocks and ran it to see, ever see the movie buellers day off it was a little freaky havin it up like that!!! but i found the noise was comin from the drive shaft, has anyone had this happen before do i need to replace the whole drive line or just the carrier bearing?????