I see in the manual the transfer case maintenance interval is 100k miles. What is the interval for the differentials? 30k miles?
No idea.
Regarding transfer case fluid. When i drained it, i got about 1.5 quarts out. I refilled 2 quarts.
It looks like it was low, maybe under-filled from factory?
I had been having intermittent issues switching between 2wd, 4wd auto, 4wd high. It was very slow at switching. Used to blink 3-4 times then switch, the process would take 2-3 seconds.
After replacing the fluid it only blinks once and switches in less than a second.
I replaced the transfer case fluid to see if that would make a difference, and it looks like it did.
While i was at it i figured why not do front and rear differentials.