Changing Fluids

I have a 1992 Toyota 4x4 that has 264,000 miles on it. Running fine, but wondering how often I should change the fluids 1) manual transmission 2) transfer case 3) front diff 4) rear diff. Last time they were changed was at 220,000.

My old manual for my 1990, essentially the same truck, specifies 60,000 mile change interval for all four.

If you have 264k on your Toyota, I doubt you need any guidance here. That’s a compliment son.