[jdiwnab]

Making proper gears in anything is EXTREEMLY dificult. Many will just make a close approximation of the gears. Usually, it isn't necessary, nor is it recomended, to constrain gears pefectly. I don't know what gears you are using, nor do I no if they would even be visible normally. I have seen the inventor for the kit transmistion and it has incredible detail, but I wouldn't even try to have all of those gears and everything move correctly. The reason is that (according to a college student that did incredible Inventor stuff), gears have very more complex shapes than may give them credit for. The gears must be made to exact specifications in Inventor to even possibly work correctly.

Don't worry though. If they get the proper speed ratio out of them, chances are that the gear teeth are too small to be seen when you drive the constraint. However, if someone does know how to do this correctly, I would love to know.