I apologize. Here's the service manual for Quietlines
http://ccmanuals.info/pdf/1x8-9%20&%...e%20Manual.pdf
page 97 shows cutaway of a gear drive machine. PTO is driven from transmission main shaft. That shaft has to be replaced to install rear PTO, and other parts installed as well.
page 99 shows cutaway of a hydro drive . No main shaft, different rear axle housing it appears.
Great lesson learned for me today!
