Ok, What have I done now... (904 problem?)

I just talked to the guy that built the trans and he thinks the clutch is burnt up. He confirmed that the kick down should be tied back to up the pressure as throttle increases. He doesn't think its the filter. I'll probably tie back the arm and see if that does anything but it sounds like it needs to come out. He's a good guy and has pretty much retired from the transmission business but he does the odd one for friends so its not like he just want to get the work from me. He'd rather not mess with this stuff anymore.