3,000 mi. ago (2 Yrs) I had the rear end (8") rebuilt in my 68 289. Had 3:1 w/ Auburn L/S installed at competent shop. I drew the oil out today (3,000 mi since overhaul) to change it and found it had a LOT of fine metal flake swirling in the oil. I can't see the gears to inspect them because there is no rear cover on the diff to take off. How worried should I be? Have the shop take it apart for insp? No worries? This thing is my baby, though my kids disagree. Thanks. Tom