I have a lot of experience with these shafts. There are basically two types of jeep shafts. The earlier ones have the plastic bushing that guys are melting apart. When you do this, you just added about an 1/8" of slop to the shaft. These shafts come on the Cherokees with the long rectangular air box. I don't mess with these.
I pull the other style. Like UNGN stated, they have a rubber boot which helps keep them from rusting. These shafts you do
not have to separate. Typically they easily collapse and have no slop. These shafts come on later Cherokees with a more square airbox and also have a fiber heat guard mounted above them to protect them from the exhaust manifolds.
Unfortunately, I'm not sure of the years, I just know by looking at them...timo22
Maybe a pic you could find of the body style will do.