I had same problem on stock 9". Had a bent axle. Put a Moser bearing on axle and problem solved. I had an inner seal, wheel seal and the moser bearing, still got oil out by bearing, but did not leak past moser bearing.
Those are all to small for the inside diameter of the axle tube even the big universal one, I tried the the universal one (2 of them) and tried to seal it in with silicone but it didn't work, replaced several outer axle seals and have had no luck. I didn't know if sumone else has run into this problem and had a solution.