Thank you gentlemen for your response to my question. While I am no expert by any degree I thought along the same lines as both of your responses. I got the rear tires and wheels too so I have that difference covered. But I have the trans axle now and will service it with fresh synthetic oil...
What is the difference betweeen a Tuff Torq K51A and a K51B Transmission? The part numbers are even one number apart too:
880202 and 880203.
I have the A transmission in my mower and can get a K51B for a spare if it would fit. What do you think?