Hi,
I am currently improving this concept: https://www.youtube.com/watch?v=uV8v33zj6RI
Which was done in element 3D. So i followed a tut on how to make some gears in Blender (since i AM a noob).
but i encountered a glitch (my fault probably)
Also blender just crashed 
without auto save -_-
Anyway, i did record this glitch and uploaded it, if anyone could give me a solution?
You might wanna pause the vid for the text 
the glitch: https://www.youtube.com/watch?v=EkKwGwoZ8AA
So, when the box, or any other non circular object has been linked to the gear it starts to glitch when you turn, so i tried the “child” option, yet the same happens. I am currently using 2.67b, i should probably download the new version 