pic: Team 948 2-Speed Ball-Shifting Gearbox CAD Drawing

Be wary, you must machine everything perfectly, otherwise it will shred itself. 114 built one of these last year, and had far too much fun with it, until we realized we had no weight for the pneumatics. However, during the offseason, this is a great shifting system. I encourage you to keep playing with the design.

Another tip is on the shifting plunger, you may want to mount springs on the part that forces the balls out, to reduce wear on the part. This is due to the fact that it needs to be able to lag until the balls line up with the grooves in the gear.


Good luck, and I highly reccomend this type of drive system!