My 2016 SLT Crew Cab started the shudder at 20,000 miles. Before that, no issues at all. Took it to the dealer who told me in plain English that it was an issue with the original fluid used in the torque converter breaking down. Explained that they would have to flush the torque converter 3 times, replace the fluid with a new hi performance type and do some computer re-programming. Drove 400 interstate miles the next day and the truck is like new again. It was handled under warranty and here is the actual wording from my service invoice: "Torque converter shudder, check as per DOC 4526930 RN PICO found 28 HZ shudder. As per DOC perform ECM/TCM update and fluid exchange and setup. Trans operating as designed. Trans in learn mode next 2-500 miles" From all the horror stories about this issue that I had read I thought I was going to be starting the process for a Lemon Law claim. I seem to have come across a dealer that knew exactly what to do. May not be the fix for everybody but it sure worked for me.
