Well the T/C was replaced more recently but I have not replaced the diff fluids in about 30,000 miles and did not use the friction modifier, so that is a real possibility. When I disconnected the ELSD cables and still had the problem, I assumed it was the brakes doing it. I have always thought that QD-II uses the brakes in addition to the ELSD but nothing I have read recently supports that assumption. I know that the ESP definitely uses the brakes.
I'll change the diff fluids and let you guys know if it helped.