If your going to be running it hard i would,i had 2 spare cases and between my truck and my parents work truck the pump ate the case on these.I bought some cheap 1s from Idaho transmission warehouse
JMAZ268 had a really nice 1 that he got from merchant but it required use to take it apart a little more.The 1 in my truck only made noise in 4 wd also. id start looking for a good transfer case to swap out its easy to do, but before you reinstall buy a set of trans snap ring pliers as you cant split the cases and install the pump rub fix so this doesnt happen again.Good luck