8-3/4 axle seals?

MoparMike1974 said
Yes, you need to replace the inner seals. You do not need to pull the center, just the axles.
There is also an outer seal but its typically not serviced since you have to remove the bearings from the axles to do so. The outer just keeps dirt out of the bearings. Its the inners that hold the gear oil in.
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Oh, okay. So the inner seals are after the bearings. Okay, I'm not sure I ever pulled the bearings. I dont notice any noise from the bearings, would it be a good idea to replace these 40 year old bearings while I have it apart? Or just run them till I have problems?