I was in the same boat as you. I thought I was in the clear as it seemed to happen in the first 60k miles. I do a lot of highway driving and only tow maybe twice a month. I tend to drive like an old man which is why i think it held together this long.This is one of the higher mileage failures I have seen. I have 92K on my 21' and I thought will so many miles maybe I was in the clear. Seeing yours makes me have 2nd thoughts.
I was outside my warranty obviously, so I was told I get a 1 year 12,000 mile warranty which I thought was fair.
Time for a LP5.