1993 valvebody help

Just rebuilt 1993 auto trans, 1.9l. Seems like one of the valves is sticking in the body. In the morning the car doesn't want to shift out of 1st. If you stomp on it, it shifts normal from that point on, at least until the next time you shut it off.

I don't have manual but was wondering if someone could tell me which valve inside controls the first to second or which piston/accumulator is the one.

Any help is greatly appreciated. Thank you.