Bought a 98 1500 Ram 4x4 71,000 and luv the truck. I had the trans. fluid and filter changed and am now thinking of changing the fluids in transfer case and diffs, but I'm kinda "old school" meaning that (if it works fine why mess with it?). I know what the maintenance schedule says, but something in me says to leave the rest of it alone. Help me out people I'm undecided.