John is correct here. It can be done-no sweat. 18 or 23 spline-doesn't matter.

Here is how.

-Take the bearing retainer off.
-take the external and internal snap rings off.
-wedge two prybars against the case and pry by way of the external groove.
-while you have it "loaded" with the prybars(pulled slightly away from the case) have an assistant tap on the pilot end of the input shaft rearward with a brass hammer. keep the pressure on the bars while tapping continuously. Don't worry, it won't take too much tapping effort. Bearing comes off.
-Install is easy. If you have the ability to warm the bearing, do it, but not necessary. Place the bearing on the shaft and using a blunt nosed drift punch tap around at the inner race of the bearing until its seated.
-Install snap rings and retainer and you are done.

MB