Never tore into a Allison but would like to some day and today was the day, but not the way I wanted to!! I pulled the rear adapter of my transmission that goes to the transfer case to replace it (had cracked it from bad bushing in transfer case) and when I pulled it out the output shaft and all the gears and c5 clutch pack fell out! Wasn't expecting that to happen. So I tried my best to put everything back in correctly and it seemed t go in just fine and bolted up fine. Went to drive it and if I out it in drive, 3,2, or 1 it acts like it wants to go then just slips into 3rd, I'm assuming, and throws a p0872 and p0700 which is the pressure solenoid switch or whatever stuck. I've looked it all up and I just don't see how it could be in the valve body when I didn't touch it. I feel I did not put something in correctly. Any help would be great. Thanks.