Slow reply here.. Thanks Merlin, I will tear into the rear axle on the rig this winter (FL) when its tolerable to work outside, haha. I have been consistent about greasing them every 5 to 10k miles through the zerk fitting and not a full disassembly/repack. Have not blown a seal out yet- but as its a 2017 I probably need to replace the grease seals and do a full clean and repack. I'd estimate the trailer has 35k miles on it.