I recently was able to buy my grandfathers MF 150 from his estate after his passing. I was able to get the tractor running the other day after changing fuel filters and diesel fuel as he had Alzheimer's and forgot it was a diesel and filled with gas. The tractor has been sitting for some time. I still have to drain all the fluids as the coolant is way past its prime, the lift arms move slowly as he never changed the filters. My question is what milky looking fluid would be leaking from the weep hole in the bell housing?