Are the wheel motors on a new 425 comparable in durability to traditional axles like on my CUT? Motor issues seem to be discussed here some, and a little insight into potential problems, maintainence routines, and any other tidbits would be appreciated. My hydraulic experience is limited to using my loader and 3pt., and this unique hydraulic drivetrain design would be a new experience. Are these motors essentially sealed devices that don't require routine lubrication etc., and if one pukes do you simply replace it? Are they expensive to replace? Thanks.