I posted this a while ago. Perhaps it'll be of some help to you:
I also have a Paragon (P33AL)Gear but have not yet had the problem of the shaft rotating in neutral. But I looked it up in the Paragon operator manual: Basically there are only 3 possible causes: Defective forward
clutch plates, Defective forward Clutch Piston release spring or Binding in Planetary Assembly.
I'll attach a JPEG snapshot of the appropriate TROUBLESHOOTING section that goes into more detail.
Let me know if it doesn't come through or if you can't read it and I'll send it to you by direct
email.
Hope this helps
PJ Kelly Attached Thumbnails