New oil bath kodiak hubs instead of the old grease through spindle system, you can see the oil level, they should be much less maintenance and more reliable. I just ordered Lucas hub oil for my emergency trailer box just in case. My last trailer had a different system that was bulletproof this one is new and has mixed reviews on the rear seal so I have a complete spare set.
Stay tuned for a review.
(Oil bath hubs are used on high mileage semi-trailers)