Just installed my new tranny from BC. Its fishing for gears and shifts very softly. Like a crown vic. It has the proper level of fluid and as long as I hold in gear at the coloum its fine. Just shifts like a slush box and when under half to wot it shifts out of second to third and then right back into 2nd. It can't make up its mind. BC won't be open till next week and I'm just curious if i missed something simple during the install. Is something out of adjustment?

 

Thinking this is due to the higher stall converter and the PCM not being tuned for it. Not sure but I can feel the converter locking and unlocking when it shouldn't.