weird yoke design need help

so on my d.d., 84' gmc sierra, i pulled my rear driveshaft off to replace the u-joint and it's held in by an injected piece of plastic that goes into a groove on the cap, is anyone familiar with this or know how to get it off?

use a torch to heat it until the plastic oozes out of the injection hole. then just install the new joint like any other.

I always just put them in a press and break the plastic.

The new joints will have c-clips that go on the inside of the yoke.

nope the new joint has retaining clips on the outside of the caps. but thats chill. yeah im gonna have some dude press them out for me, thanks guys

The new u joint will have clips on the INSIDE of the yoke. It is neat to do actually, just heat the yoke up evenly, the plastic melts and spooges out like a little worm. Then you push out the caps, install the new joint, and put the clips on the INSIDE! There are flat sections on the inside of the yoke, which the clips rest against. There are no grooves on the outside to hold the clips. I believe you should have NAPA joint P/N P534G for that application.