Hi there,
The swivel hubs are part packed with Molly grease there is a seal in the axle tube that prevents diff oil from entering the swivel hub, if oil dose get in the grease will dilute and leak out past the hub seal, this is only a grease seal and it wont hold oil, if you have oil)grease leaking from the swivel hub seal, the inner axle tube seal is leaking and needs replacing, don't think the later cruisers have this square access plug, you will have to look and see, if it dose you can add grease, but if it is leaking, you will need to fix this correctly.
Mark (mhpautos)
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Tuesday, November 10th, 2009 AT 4:48 PM