Looking down from the top with the shifter removed, I can see that what I believe to be 1st/2nd gear rail and the 3rd/4th gear rail are lined up so both of these are in the neutral position. I can't see the reverse shifter shaft and don't know if something on this one should be lined up with the others or not. I can tell you that the tranny shifts very clearly into 1st, 2nd, 3rd, 4th and reverse. If the "tower" you mentioned Stuart is the top cover of the tranny, I removed it when I replaced the gasket I believe, although this truck has been apart for 6 years and I can't recall if I replaced that gasket or not. The tranny was shifted while out of the vehicle, but with the tower intact and it is possible I shifted gears on it with the top cover off, though I don't believe that is the case. With both the 1st/2nd and the 3rd/4th gears lined up for neutral so the gear shift lever rocks sideways (like it should be in neutral), the truck is in gear and cannot be moved forward or backward without depressing the clutch. I'm assuming the clutch disk can't be stuck to the flywheel or else I wouldn't be able to move it back and forth at all even with the clutch pedal depressed. Doc, what you pointed out about being able to slide to the next gear rail moving side to side is exactly what I can do, so it would appear everything inside the tran is working as it should be. When I re-installed the tran, it stopped about 1/2" shy of mating to the bell housing. It was necessary to push the clutch in to allow it to slide forward. I've seen on other posts that this is not unusual, so I'm assuming that isn't the issue. I rebuilt the driveline and reinstalled it with a new carrier bearing. Nothing changed on the angle of the driveline that I can see. What am I doing wrong?