Another thing to consider is many of these old cubs still sport their original hydro filters and hytran. Some were changed and the wrong filter put on and ATF put in 'em. The hytran turns to sludge as it pulls water out of the oil. Could be a plugged filter as well. I've heard of guys getting hydros that didn't work. Changed to fluid and filter with hytran and a Cub Cadet filter and were good to go. Maybe another option.
