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The 5-ton hubs run on wheel bearings packed in grease. Not sure why but I assume it has to do with the ability to ford deep water without contaminating the oil that lubes the differentials. There is a seal that is sandwiched behind the wheel bearing nuts that seals against the outer race of the outer wheel bearing to keep the oil and grease separated. I plan on tossing this seal so as to have a normal oil bath hub like our trucks use in the 10.5" 14-bolt FF. After adding the oil to the hubs this should require an additional 2 quarts and that will have me at the 9 gallon threshold.
Quote from: Engineer on August 14, 2017, 08:19:15 PMThe 5-ton hubs run on wheel bearings packed in grease. Not sure why but I assume it has to do with the ability to ford deep water without contaminating the oil that lubes the differentials. There is a seal that is sandwiched behind the wheel bearing nuts that seals against the outer race of the outer wheel bearing to keep the oil and grease separated. I plan on tossing this seal so as to have a normal oil bath hub like our trucks use in the 10.5" 14-bolt FF. After adding the oil to the hubs this should require an additional 2 quarts and that will have me at the 9 gallon threshold.I'd be interested in knowing if this will work, I have an M35, 2-1/2 ton axles, but similiar, I'm pretty sure the inner seal (where outer seal is the grease to oil seal) isn't meant for oil retention, and so these can't really be successfully converted to oil bath. But that's just what I've read.Sent from my SM-S920L using Tapatalk