[thefro526]

Originally Posted by Scoyle

Is this a replacement for the current shifting mechanism on the 2 speed 3 cim shifting mechanism or is it a separate addition to the gearbox?

The PTO Add-on Kit is an auxilary mechanism that's added to the 2-Speed 3 Cim Box. If you look at this picture it should make a bit more sense. In the standard configuration, Shaft connecting the upper most CIM with the two below, does nothing other than transmit power from the top CIM to the bottom. In the PTO configuration, this shaft serves two purposes, the original one (connecting the lower CIM pair with the upper) and serves as a Power Take Off for the transmission.