Have a 2wd 50hx on an out farm for feeding silage. The front axle is getting a bit shook. I have access to a free 4wd front axle from a burnt out 50hx which was in a barn fire. Machine was completely burnt out. It had only about 5000hrs beforehand done. What would the 4wd axle require to get it going again and would it be an easy conversion or would the axle be ever right again?