That's just the cable assembly that screws onto the back of the driven gear. To get the gear out, you have to remove a (10mm?) bolt and the retaining ring from the side of the transfer case. At that point, you'll be able to slide the gear out. A clutch job should not involve messing with the driven gear at all. While you have it out, *with the vehicle secured with jack stands* put the truck in neutral and spin the driveline. While you're doing this, look through the hole the driven gear came out of with a flashlight and check the condition and position of the drive gear. I can't imagine the driven gear would get chewed up without damage to the drive gear as well.