Glad you got a hold of Kirt. He helped me out with mine years ago... still running strong. I had the checkball problem that when I pulled out of the garage, it was fine but when I wanted to go forward, I couldn't... it felt like the parking brake was on... both the drive and reverse were activated at the same time. Since I didn't go anywhere or drive with any sort of problem, the tranny was fine and just the valve body needed to be rebuilt.
How much is a rebuilt valve body going for these day?