I have 01 lb7 it started sliping and put me into limp mode when you WOT past 80mph. So I bought the Ppe stage 5 with ml converter. Had a transmission buddy put it together. When they finished it them and my boss drove it said it shifted through gears great. I got in it put it in drive it grabbed 1st for 3seconds then went to 4th and stayed there pulled the codes and got p1711 which is evalve stuck closed. Pulled the valve body and sure enough e was stuck. So used 4000 grit sand paper and polished the bore and valve put it back together and same thing happened. Pulled it apart cleaned up the bore put a spring out of 4l80e. Started it up ran through 1st when it was supposed to shift to second it locked in 4th said evalve stuck open. Have p1710 I believe. So we are stumped and this is my work truck so it's putting a financial strain on my family. Oh and we put new pressure manifold and new p/n safety switch and I'm using transynd fluid. Thanks for any ideas and help.