Tale of 2 Saturn Overdrives

My OD got stuck in over last weekend, no serious problem as such. I read how the forks can be alum and break so I take it out and yep, fork is in two pieces. I thinking now would be a good time to install my pto while fixing the od, but as I am looking at the old od the PO gave me with the jeep, I see they are not exactly the same. The old one has an extra gear on the rear, that I am guessing mates to the pto, but looking at the pto I think there is another gear that might be missing. Any help is appreciated.

Old OD on the left
https://picasaweb.google.com/115996...hkey=Gv1sRgCIGdk9bRieO2EQ#5705686326419248482
Broken fork on the right:
https://picasaweb.google.com/115996...hkey=Gv1sRgCIGdk9bRieO2EQ#5705415417187677746

Can you take the gear off the old and slip on the other?
https://picasaweb.google.com/115996...hkey=Gv1sRgCIGdk9bRieO2EQ#5705423251569455778

Thanks
Steve

 

Okay, upon further review I see how the OD & PTO engage. My shift fork on the PTO wasn't matched to the groove and now I can see how the two gears join together. Lookw like I just need to take gear off old OD and put on new. Sorry about the pics not coming thru, I'm still learning.