Chris,
It sounds like you have some debris in the tranny and it ends up holding one of the valves inside open. On the newer trannies they relocated it so that it can be cleaned without pulling the convertor. My did it once and I called the factory and Nesco and they both told me to let it warm and then take it out and run it hard in first. I did that and have not had the problem again.
Also had to change fluid when doing this to help flush it out.
Good Luck
Bill
ps I am not a tranmission person so I really can not tell you which valve.
It sounds like you have some debris in the tranny and it ends up holding one of the valves inside open. On the newer trannies they relocated it so that it can be cleaned without pulling the convertor. My did it once and I called the factory and Nesco and they both told me to let it warm and then take it out and run it hard in first. I did that and have not had the problem again.
Also had to change fluid when doing this to help flush it out.
Good Luck
Bill
ps I am not a tranmission person so I really can not tell you which valve.