Searching threads for this same problem, I have inner seal leaking too. The bummer part, I recently install new ball joints, u-joints, hub seals, one hub, and dust seals. I hate pull that all apart again. It was a royal pain the first time, very rusty. I hope it will be easier this time.
I am wondering if I'll have to replace the hub seal again?
2002 F250 4x4