Hydraulics, transmission, and torque convertor shouls have seperate reserviors. You should use type A or Dextron automatic oil in case-matic. You can use TDH if you wish, it should be a good grade of hydraulic oil. If you wish and want to just keep one oil I would go with either Hytran or dextron automatic oil.
Case o matic is suppose to work just like a automatic trany in a car. Oil should be very clean, filter cleaned, and at correct level. Very good trany if taken good care of.