I just finished my tranny swap and everything seems to be working pretty good but I'm throwing a tranny code P0748 pressure control solenoid a electrical. I'm getting horrible gas mileage and its shifting into 2nd to quick I used speartech's wire kit and they did the programming on my PCM if anyone has anything to say it would be greatfully appreciated.

 

I did a quick search and found these threads. I hope they help

https://ls1tech.com/forums/automatic...e-problem.html

https://ls1tech.com/forums/automatic...wap-codes.html