I have been having a problem with my transmission not shifting into 2nd gear when WOT. All I have to do is lift the throttle just a bit and it will shift. My line pressure at idle with truck in drive is 62psi. I have my shift cable adjusted correctly. There is no play in the shift leaver on the side of the transmission. This happens with the comp on or off. I also have no codes. I had them pulled with a scan tool. I have a Transgo kit im going to install but I want to fix the problem before I install the transgo. Whats my next step??