I just recently did this when re-sealing everything on my trans and t-case.. I used a standard 4" 2 arm puller from Advanced auto parts (a 6" would work better, but they were out of stock).. This trick was reccomended by one of the other IH8MUD members. Take 2 of the bolts from the t-case end cover you removed and screw them in (opposite sides to each other in line across the outputshaft) until there is a slight space left between the bolt head and the case. Remove the end nut on the output shaft, then install the puller. Place the ends of the puller underneath the lip of the bolts you screwed in, the crank away! The bearing will pull out with the case as it seperates. As mentioned above keep track of the gears.. Reinstalling, the bearing will have to be pressed back on, I drove it on with a deep socket until I could crank it on the rest of the way with the nut. Good luck!
Mike