Here are the links to CAD models of the gearbox:
Pro/ENGINEER Student Version
STEP
ACIS (SAT)
If you want any other format, just let me know (reply or private message); Pro/ENGINEER can output to a few dozen formats, but I was limited to how many files I can fit on my engineering web space at any one time.
In case the four-digit team number worries you, this design won Leadership in Control in Pittsburgh, Delphi Driving Tomorrow's Technology in Long Island, and Xerox Creativity and Motorola Quality at the Canadian Regional
.