These are the basic change intervals
Transmission Fluid = 30,000 miles [Fluid = ATF+4]
Transfercase = 15,000 miles [Fluid = ATF+4]
Front Diff = 15,000 miles [75w-90 or 75w-140]
Rear Diff = 15,000 miles [75w-90 or 75w-140]
Engine Oil = 3000 miles or your perfered change interval [5w-30]...