[Matt Reiland]

I love the tranny, it worked perfectly for us this year, it had ample power for whatever we needed it to do. This gearbox would allow our robot to literally wheelie off the line, and almost completely jump the plastic on the ramp. All this with blue supergrip belts!

Tips/Tricks you ask:
1. We switched all gears to standard martin 20 pitch. Low was an 80:20 tooth high was 50:50
2. We made a gear that was 16tooth and welded on a 48 tooth 0.7 onto it and pressed it onto the CIM for the first stage, the ratio worked well matching the CIM to the Drill. The end of the 0.7 mode gear was then turned down to fit in the bearing on the opposite side of the CIM motor. Now, this assembly was too large to be removed from the motor plate after the gear was pressed on, next year I suggest making the CIM motor mount removable keeping the gear intact.
3. MAKE SURE THAT THE CENTER DOG CAN NOT BE IN HIGH AND LOW AT THE SAME TIME. We had one gearbox slightly narrow and the box went from full speed to no speed instantly, ripping the pinion off the drill and severely bending some teeth on the 0.7 mod mating gear.
4. Harden the dogs and dog mate (In fact do like the picture shows and get rid of the dog mates, mill them into the gears) We ended up welding the dog mates onto the gears after shearing off the three screws that held each on.
5. We omitted the carrier for the end of the drill motor, it was only supported on the motor can side.
6. Lighten up all the gears lots, the box is heavy otherwise
7. Air shifting worked fine, we are investigating using RC Servos for next year.
8. Suggest using gear drive out of the gearbox, we were throwing chains at Buckeye until we made automatic chain guides for Buckeye.
9. Suggest that everyone put a 90 degree break on the top and bottom of the gearbox plates for strength, ours are pretty warped after the season (But they still keep kicking)

If I think of more I will post.