1946 CJ2A "Bendix" type joint --- I don't have the repair history of my jeep, I've only driven it <10 miles since I bought it.

In the process of doing a disc brake upgrade. Opened up my steering knuckles. The passenger side spindle plate came right off and the inside is clean and the bearings have a very thin lubrication. The cavity has no build up lube at all and the bottom king pin bearing is clean and shinny. The driver side took some effort to get the spindle off and inside is grimy with a grease but nearly empty.

Could the passenger side be newer and they used a clear lubricant? Or do I have a leak in the bottom king pins/spindle plate on both? Is differential fluid leaking into my driver side knuckle?

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Before I drop $$$ on 2 quarts of https://torqueking.com/product/777/c...4-front-axles/ or any other EP lubes suggested in this forum, should I hunting down the source of the missing lube?