4020 pto

IF you really do have "1000 only" PTO and want to convert to 540 / 1000 PTO, here's a summary of what's required:

Removal of the long shaft at the bottom of the trans case and replacing it with the long 540/1000 shaft and bearings. You will also have to replace the rear bearing housing assembly and get the stub shafts. A soft steel plug to the upper right of this housing will be knocked out to install the 540 countershaft assembly. All of this can be done without splitting the tractor. These parts are still available new, but are $$$! A GOOD salvage yard will be able to tell you exactly what you need to pull this off, but beware; These tractors have been in service long enough to be worn out. Check your "new" cluster gear and the gear on the long shaft for pitting. Don't worry about the blue area on the long shaft. They are all that way. It's where the factory guys weld the two parts of the shaft together.

Power-shift or synchro?

Did you look REAL close for a snapring, or try to pull the shaft out?

I've never seen a real one, but I think it is listed in the parts catalog.