Thanks for all the responses to my rear diff questions last month. I bought a used diff and slammed it in the MoneyPit. Not toooooo difficult with a transmission jack. I installed new bearings in the rear hubs while I was there. I packed those bearings like crazy with red high temp grease. However, I forgot pour diff lube into the space between the inner and outer bearing as recommended in the service manual. Sealed her all up and put lube in the diff along with too much limited slip juice and drove it for about 100 miles. Serviced the diff on Saturday after the oil cooler flush. Put in a little over 3 quarts of Royal Purple. There was a little smegma on the plug magnet, but not too bad. However, I have a faint little whine. It seems to be on acceleration. It sounds a little like a gear drive unit on a hotrod. Should I pull the axles and add some fluid. I just assumed that the fluid would find its way into that hub housing. I further assumed that the amount grease that I packed in there would hold the bearings until some fluid found its way out there. The whine is VERY disappointing given the amount of work that I did, but that is the crap shoot of buying used parts. It saved me about $600 at the time, but it might end up at breakeven, and in the hole as far a my time goes.