Paragon transmissions

[Dutch Voyager]

My boat is a 1974 Coronet with twin Chrysler 318's connected to Paragon PV33 trans. My question is what do the numbers represent, I'm thinking of replacing or rebuilding the trans, I found a Paragon PMV20, so what's the difference, it appears to be the same outwardly, I also can get a pair of PV31's Both of these trans would be cheaper then rebuilding, but what do the varies numbers mean, torque or something

 

[GA_Boater]

This PDF on page 34 has some decoding of the Paragon model numbers - http://marinegears.com/catalog/TMI_catalog_wm.pdf

If I read the charts correctly, V mean V drive, the next number is the horsepower rating and the final number is the gear ratio. The Paragon section starts on page 31 and the entire section may have other information.

 

[Dutch Voyager]

Thank You, very helpful