Here is a video of the gear box in action from forward to reverse.
http://www.youtube.com/watch?v=OVRBeCuj4PY
Here are all the parts in the gearbox
This is the input gear/gearbox cover
These are the shifter mechanisms. Basically the shifter is an acme screw that is coupled to a shifting gear. The gear has clutch plates and moves between a forward powered gear and a reverse powered gear.
This is the powered reverse gear assembly
This is the differential assemble that generates forward and reverse gear motion from the input gear.
Here are the output and forward powered gears installed in the case halves
Here is the gearbox almost ready to get bolted together
The shifter assembly installed onto the gearbox
The complete gearbox
