[Al Skierkiewicz]

Of all the teams that have posted here, how many did not remove the shaft locking devices? The drill transmission is pretty well designed and coupled to the First drive train should not get anyone into real trouble. I have found that many teams miss a few simple things when assembling the drive system.
You need to remove the locking pawls, the alignment of the helical gears directly affects the friction reflected to the motor/transmission, drive shafts need to be supported at both ends with aligned bearings, and, as most of you have stated, some positive locking arrangement needs to be made to hold in the shifter clips.
Please let me know if any of these apply to you.