My 590 m has 16 hours on it and a rear shock is leaking oil. Took it to the dealer and they replaced while I waited (about 15 minutes) Shop manager says they know they have a problem. I was thinking about replacing with the heavier shocks that are recommended for a cab or plow. He says wait until they are out of warranty and hope in the mean time Deere does something about it. anyone else with this problem?