rear axle seals 51 L-120

Was there a conclusion to the seal issue? Two different seals, 6090 and 6090S, each a different size. I'm about to do the seals on my L130 and want to make sure I order the right seals the first time. Also, my L130 has what looks to be hubs meant to accept a dully setup, but has only ever had singles. Are the seals inside anything different than what has been discussed in the above posts?

6090s is the correct seal for L130. This seal keeps oil from the rear axle from getting into your bearings so they need to be packed with grease like you would on the front wheels.