My 4WD was not working so I removed the front gearcase and found I had a broken roll cage.

My question is that the CV joint couplers? that have a spline input into the front gearcase have quite a bit of play when inserted into the gearcase.
I would say 1/4" in all directions. Both sides are the same.
The coupler splines and the receiving groves in the gearcase look a little warn.

Is this normal or should I replace the couplers and the receiving shafts in the front gear case?

Thet have been this way for quite awhile and do not appear to be causing any problems.

Thanks for any help.
Mark