I have 62,000 miles on mine. I also had a transmission leak around 55k-57k miles and they fixed it no hassles with loaner car all went well.Then after my last engine oil change I started noticing this rumbling noise at certain times when I was dynamic braking and I am hearing deficient (verified by hearing test & Bride:) and when she was riding with me she asked what the noise was? i figured it was time to take it to my dealer and have it looked at while they did the seat belt recall work but they were unable to duplicate the noise. Partly my fault as I told them it was happening while braking between 35-40mph instead of where it was noisiest 25-0mph. 3 weeks later well now you can hear it well at most speeds anytime it is in electric drive or dynamic braking. the engine muffles it if it is running on it but I can still hear it. I hope they will do the right thing by you and fix it under warranty since you had it in under the 100k. I am supposed to take mine back in and I am going to insist a tranny tech rides with me. when they drove it last time it was a general tech and I was not present. Good luck to you.