TrueTrac Issues..?

[4wayair]

I've got a Detroit TrueTrac in a Moser 9" and have just over 600 miles on it. Pulled out of the driveway and started hearing a slight rubbing sound (like a tire rubbing on 1/3 of its rotation) when car gets over 5 mph. Fluid is full and have isolated the noise to the differential. I read some other posts on the web about TrueTrac bolts backing out etc... I bought the car out of state and didn't due the install so am not that familar with TrueTrac's. Was wondering if anyone else has had any issues with a TrueTrac or if there were any gotchas on the disassembly / re-install before I tackle it.

Thanks in advance for any advice.