So here is the deal, i recently removed the ring and pinion on my ford 9" to replace the crush washer. After reinstalling(and filling with fluid) i get a hollow whine as the rearend heats up and i put it in neutral and coast. I am thinking about removing the entire third member to have a look at what is inevitably my fault for not researching any torque specs when putting the ring and pinion back in. Does anyone have anythoughts on what i might be looking for i.e. not shimmed properly, bad bearings, worn gears. i'm pulling this sucker out today so any thoughts that might save me from a costly visit to the diff. shop would be greatly appreciated. Thanks Guys!