How ofton do you have to change gear lub in transfer case of 4X4's ?

I just would like to know, thank'sHow ofton do you have to change gear lub in transfer case of 4X4's ?
depending on how often you use it, but usually every 40,000- 50,000 miles.How ofton do you have to change gear lub in transfer case of 4X4's ?
Usage dictates the change interval.



Under normal and not abused conditions, I would think you could take it to 100,000 miles.



Do any rock climbing, some mud, or other high torque uses? Then I would say 50,000 miles.



Been running in the deep water and lots of mud and ick? Then I would change it tomorrow.