The K'nex 3 Speed Gearbox

This is a pretty simple, totally k'nex shifting gearbox with 3 gears. Hope you can use this in some of your models.
I now have an updated version of this.

Step 1: 3 Different Gears

(notes in the pictures) watch for the difference in each picture

Step 2: Watch This Movie of the Different Speeds

Step 3: Now Start to Build. Step One: the Frame

copy the pictures

Step 4: Step Two: the Axels

once again, just follow the pictures

Step 5: Step Three: Put It Together

follow the pictures more, then your done