Mine was leaking the first day I got it...made my heart sink....
took it to the "authorized Isuzu" dealership, they ID'd the problem quickly, ordered the "shift shaft seal" and had it repaired for a total of $107 including labor.....thought I was goin' faint when it turned out to be so cheap....when does that ever happen?!
Guess it's easy to get to like Bart said and therefore fast to change.