Just got my 03 all back together. Tranny build consisted of alto power packs, transgo kit, and PPE converter. First off as soon as I got it put together it threw a couple codes and the service brake system message was on and also the brake light and abs light and the line was missing from under the shift indicator. So I bought a new nsbu from merchant to replace the old black one that was on it. Bam fixed it im good to go. Driving the truck around today everything is perfect, motor running awesome and tranny shifting good. On my way back to the house I engaged the 4x4 just to make sure everything shifted into gear ok which it did and I took it right back out of 4x4. I pulled into the driveway to park less than a minute later and the line was gone from under the shift indicator and the tranny is in limp mode although I never felt or noticed it go into limp mode. I shifted from P to R and bang it shifted into gear hard and from R to D same thing goes right to 3rd. WTF? The only thing I can think that may have caused a problem was the tcase shifting in and out of 4x4. Any ideas? I havnt pulled the switch off of it yet.