I use Dexron III ATF in mine. I think most guys do.
M-1110 would be MF's fluid. I've never seen it myself.
Dextron III is the replacement for type "F" , most all the the Hydro's can use either ATF or their own brand of Hydraulic fluid. JD. uses Hy-Gard or Dextron III in thieir GT's.