Thanks for that idea,
I pulled out the tcase actuator last night and checked it out and it was fine. I did not change the fluid but I was going to do it. I just didn't want to stop to run out and get more gear oil. My new thought on this after driving it and having the same problem is that it is the front axle pedestal...I can't remember the right name as I write this at work. It is the holder for the front axle as it comes out of the oil pan on the passenger side. When I notice the wobble/problem that causes the DTC light to come on and I let off the gas, I feel the front of the car drop slightly and to the passenger side...weird I know. It is slight but noticeable. The new diff is just fine as are the axles/CVs etc.
I'll let you know when I pull it off to take a look. I'll also change the diff oil.