Transfer case: 2 quarts Motorcraft Transfer Case Fluid.
Rear axle: 6.9 pints 75w140 synthetic. Pay attention: that's SYNTHETIC gear lube.
Front axle: Your Owner's Guide calls for 3.8 pints 75w90 synthetic axle lube. The latest workshop manual published in 2003 for 2000 Excursion says SAE 90 Premium Rear Axle Lubricant.
The current quick reference chart for differential lube used by Ford techs is at:
Motorcraft quick reference chart for axle lubes
Since the quick reference chart is current, it may be different than old printed manuals from several years ago. I can't read upside down, so I've learned to print out the chart and then I can read it.
Transfer case lube changed a few years ago. Your Owner's Guide says to use MERCON, but MERCON is no longer available, and you cannot use MERCON V. So you have to use the new stuff Ford developed specifically for transfer cases - Mortorcraft Transfer Case fluid:
http://www.fcsdchemicalsandlubricants.com/Main/product.asp?product=Transfer Case Fluid&category=Transmission Fluid
Sorry to drag up an old post, the quick reference chart you linked shows my 02 F350 taking 75/90 synthetic rear axle lube, and my owners manual says it takes 75/90 premium 4 wheel drive lube. I just changed it with 80/90 rear axle lube, did I mess up?