does anyone know of any sites where I can get prices on a rebuilt rear diif. Does anyone know of any sites to buy a good used rear diif. I am pretty sure mine is on its way out, it seems to get louder each time I take it out, I just had the fluid changed, the guy said it wasn't dirty. the sound goes from quiet to loud as I accelerate, I had the same problem in my explorer, must be the same thing.