On our first trip, ( Prime Time, Lacrosse / Lippert Axles) the bearings ran very hot, the dust covers came off 3 of the 4 bearings. I removed all four wheels, removed and cleaned all grease and hand packed with an Ultra Lube 4X wheel bearing grease called High Performance LMX "RED" Grease by Plews-LubriMatic ( www.Ultra-Lube.com
) It was like day and night, all 4 bearings are now absolutely luke warm after 3 hours of running at 60MPH, compared to the factory grease which I couldn't touch the drum without burning a finger.
We just returned from the FROG Rally ( Forest River Owers Group) in Goshen Indiana, on the tour of the Prime Time plant we learned they are switching to DEXTER axles. We met other owners who had bearing burn out as well. But, it probally doesn't matter who makes the axle, they have to be packed properly with a high quality grease. I have been made a believer with this Ultra-Lube grease with a major difference in running temperature.