If you're not getting drive, you can do some diagnostics before removing wheel stations...
Jack up one side (other side chocked) and with the transfer case in neutral, handbrake off, you should be able to rotate one wheel and the other should turn. Rotating backwards, should give about 5 degrees of motion before the other wheel starts moving back.
If that fails, have a look at what the driveshafts are doing (you may need to remove the radio tray, some gearbox covers and the front driveshaft covers). If turning the back wheel doesn't cause the driveshafts to move and the front does, you know the break is at the back, or vice versa.
If you can identify the problem being at either the front or the back, then removing the outer hub will tell you what condition your planet gears are in; if they look fine, then it's either the bevel box or tracta joints.
Drop the oil from the suspect bevel box; a dead bevel box will have ugly oil in it.
Repeat for the other side.
Cheers,
Terry