Major fluids for myself:
-Change oil every 3500-5000 miles, synthetic Pennzoil Plat 5w-20
-Change rear diff fluid every 10K miles (variable based on stop and go 'severe' driving), 80w-90 Kendall conventional (friction modifier for LSD, none for rubi)
-Change front diff fluid every 30K miles, 80w-90 Kendall conventional (variable on actually using 4WD. Myself? Seemingly never. No friction modifier for any models)
-Change transfer case fluid every 20K miles, any ATF-4
-Change manual tranny fluid (wife's Jeep) every 25K miles, Pennzoil synchromesh, especially right after buying vehicle due to reports from people of being under-filled from factory.
-Change auto tranny fluid (my jeep) I have no clue when or how due to the complications of changing it. The auto tranny must be at a *perfect* temp to measure using the dipstick properly and I've destroyed a modern automatic transmission before by refilling without properly measuring temperature first.
Some of my intervals are overkill but $35k on a vehicle is more than I thought I'd ever spend so I guess I just try to baby it as much as possible. If you're rich and your wrangler is a weekend toy then you'll understandably be lazy with your intervals which is completely ok by me.
again, that's just fluids. There's plenty of more maintenance to do including other fluids I didn't list (brakes, steering, coolant)