Cody, if your truck is 2WD, you don't have a transfer case. No worries for you. I would go ahead and change the transmission fluid since you have 32K though. Every 30K is a good rule of thumb for most, 20K for vehicles that see hard use.
Garett, change your t-case fluid when you get a chance. 177K is a lot of miles to go on original fluid. The manual probably calls for Mercon in your truck, but Mercon V should be good.