GM Express Warranty/ Transmission Service
My 2011 GM Express began to vibrate (Rumble strip sounds) at speeds around 40-45MPH. I took it to the dealership and they diagnosed the problem as a bad torque converter. It was under warranty (August 2015) so no charge! Fast forward a little over a year. Same symptoms, rumble strip sounds at about 40-45MPH. Take it back to the dealership. Diagnosis: "internal' problems with the transmission and it needs to be replaced. Oh, by the way, sorry it is no longer under warranty. Am I wrong to think that the initial diagnosis was wrong, maybe the transmission should have been replaced then? Am I wrong to think that I may be getting ripped off?