Hi Chris; Just to add to what Larry said, there is no common sump, trans, hydraulics and rear differential are all separate unless a seal has gone out. Trans, hyd, and rear diff can all use the same oil that Larry mentioned.
Rear differential - 9 quarts
Transmission - 6 quarts (add another pint if it has a sherman)
Hydraulic - 8 quarts
Engiine - 6 quarts (with filter)