TF 904 Auto slipping 2nd to 3rd when manual shifting @ higher revs

I like the th350 kd the best. It's almost self explanatory, is a pull system instead of push, and it's complemented by a modulator. About half of the th400 customers think that plug on the side is for the reverse lights. I've been trying to figure out a simple way to make the tf kd a pull system.