I checked the fluid warm with the engine running, in park. Problem occurred as I was driving with a warm engine and tranny. How do I check the B2 band material? Do I need to pull the tranny and do a tear down, or would there be tell tale signs like debris in the pan? If it requires a tear down, I'm out of luck since I don;t have the skill or tools, so I'll have to find a competent shop locally. Thanks for the help.

ETA:

Just checked your blog and your post on June 19th describes whats happening to mine, at the last paragraph. The piston body is scratched around the circumference close to the head of the piston, where it slides through the bushing and seal, so I guess this is a potential cause?