[thomas 1863]

so i did a hrydo oil change last winter because it froze on me due to the moister in the oil after i did it i had to make the gasket due to the fact that the one i bout got thrown away but after i cut it out and put it on and filled it up it always leaked well this winter i was using it to plow with due to my 127 being down and went to use it one day and it would not move i think it was out of oil so i put what oil in it that i had and it wasn't much so i left it sit pulled it out today to change the gasket and oil and i saw that one of the middle bolt holes was cracked but there is still some threads that give a good bite is this what was causing my leak i also go less then a gallon out of it when i drained it what if any thing can i do about this