After running the TruTracs for around 8,000 miles, they stopped making the noises. I am convinced that there is a significant break-in period with these 3rd members. If I had to do it all over again, I would go with ARB lockers.
Also, I replaced the natural gear oil (in the 3rd member) with Mobile 1 designed for Limited-Slip diffs. Now I don't get any grinding or popping from turning corners after things get warmed up. Whether that was related to a break-in period or the new oil (and resulting decrease in heat/friction) I don't know. Either way, it's gone.
Finally, I ended up getting DC drive shafts (front and rear) from GBR and custom-length trailing arms from Rock Ware to get the pinion angle just right. I had the rear shaft rebuilt, locally, without the adapter. Now the drive train is quiet and smooth.
Not sure I'd go through all of this BS again, but I am very happy with the current set-up. All is well that ends well.