I have been searching online and can’t seem to find what I am looking for. So I’m just going to ask.

I have a 14′ Rancher 4×4 manual shift.

On the drive shaft or final drive, what comes out of motor and connects to the differential. The black shaft has a round piece that looks to be press fitted to cover the seals/connect into the differential. It’s not the black boot that covers the connection at the motor.

This week that round piece has come loose and is just spinning on the shaft. I can’t find a lock screw or anything to hold it in place.

What is it? What are my options to fix?