[wingnut60]

I feel the same as Walt above--the NRLs/50mm are the same whether Lippert or Dexter axles--and I think there is now a connection between the 2 companies. Remember that the bearings need to be pressed out/in--much harder to hammer them out without damage like the old school ways we did back when...

Terry,
Here is another thought: my NRLs on the '05 showed a small amount of grease on the back side for a long time--had them replaced before a trip to AK. All 4 bearings proved to be good upon removal, even tho there was signs of grease on the wheels. The only mentioned method of checking the NRLs is vertical movement with weight off the wheel--movement of 1/4? in/out is indication of wear. There is a stated movement distance somewhere on the web, not sure it is 1/4"
You have very low miles for the age, I think you may have a non-problem.