[Arefin Bari]

I am going to try to explain this right. As the picture shows, the output shaft is the same one as the shaft where shifting takes place. So wouldn't the shaft move back and forth (since it is mesh shifting and you got a wheel on the same shaft). How is that going to affect the wheel on the output shaft?

From what I am looking at, my suggestion would be to add a pinion gear (bunch of vex gears together) to the shifting shaft (on the right side of the picture, you might have to make the width of the tranny a bit bigger), and then mesh it with another gear on a new shaft. Make the new (third) shaft the output shaft.

Matt, I know you are limited to one vex kit. This was just a suggestion. So far you have done a great job. I like the way it is coming out. Figure out how you are going to shift and you got yourself a sweet little mesh shifter. Can't wait to see what you come up with next. Good luck.