[gauntletguy]

However you do not want to add so much grease that it goes onto the shafts as our team had learned the hard way. A mentor told some of our students to grease the gears but they greased all of it and the keys on the CIM shafts fell out on all of them almost every time we drove the robot.

They had to be cleaned with rubbing alcohol, but now we have the problem solved.