Aengus

I have a 2019 GMc Sierra Limited SLE , 5.3 ltr, 6 speed. Around mid 30k started having shudder, hard shifting, whining noise. Long story short, torque converter failure, replaced TC with a refurbished one, tranny rebuild. Dealership was decent during the process. 7 months later , same symptoms, back in the dealership. I was hoping the 6 speed would have been better than the 8 speed but no such luck. Still waiting for a callback on the diagnosis.