I called two dealers and both had no idea, Im not sure how they have been servicing these machines. I finally was able to talk to someone with Kubota a tech. person and they assured me the fluids were seperate, which is what I thought by the level of the fill plugs on the hub housings compared to the diff. housing, and they told me the only way to get the 5.8 qts. out of the housing was to pump it out. Thanks for the suggestions and I hope this helps someone with a M series 4x4.