pic: 222 3 speed closeup/cutaway

[tkwetzel]

Also, any generic advice on building trannys would be great. We have limited machining capabilities (no high tech stuff i.e. CNC etc.).

There are a few white papers on trannys on this site. There are many good white papers. Our team has posted a white paper for our 2-motor, 2-speed gearbox, that only requires a manual mill and lathe to create.

Another good and simple gearbox is team 33's 4-speed automatic gearbox this year. I don't know that there is a white paper available for it, but you might be able to get a lot of information from them about it. It supposedly can be made with a lathe and a drill press with an X-Y table.

Just some suggestions. There are tons of designs out there, as you can see by the variety just this year. A lot of it sometimes depends on the game. Good luck with your offseason work!