My 2021 Yukon XL Denali 4x4 is leaking again from the drivers front axle seal where it meets the diff. I have 59k miles and this is the 3rd time in 1 1/2 years. Its been fixed under warranty but it seems like every winter when auto 4x4 is engaged, it starts leaking again. Is it common to have a plugged vent tube, or axle wear where the seal sits? I had the same issue on a 07 Tahoe back in the day. Anyone else have this issue and found a solution?