I have a chain and gear assembly. The chain was created using the chain component pattern tool. I am using the Rack and Pinion mate using a line connecting the two pivot points of a chain link as the Rack and the pitch circle of the gear as the pinion. When I pull on the chain, the motion looks good. The problem that arises is that if I pull on the chain enough the rotation of the gear will turn the other way. Why is this? I get no errors.