Armyofone, I had the same issue with the reman coverter, so they finally replaced the converter with supposedly a new one, the shudder came back quick, but not as bad as the reman was, this is frustrating! Especially on a brand new vehicle (3 years ago bought new). I brought in the post that you had of "Dealers are wasting to much time in replacing the converters with reman, to install the new one" I had that done and the shudder is back, but not as severe, I don't want to get rid of this truck, but this transmission is Junk! I had a 2007 prior to this 2011, and it never, ever had noise issue, shudder, abosolutely nothing wrong with it, othe than the slight bump, (kick from behind) when come to a full stop. The 2011 did the same thing, until after the new 3rd torque converter was installed, but the shudder is annoying. It sounds more of a programming issue, or maybe the lock up solenoid acting up, but it acts on occasion, when not expected. Hopefully Tran Engineer has an answer for it, maybe there is a TSB for it? I don't know? I thinking of getting rid of this unit, especially key FOBIK works when it wants too, torque converter shudder, Hemi engine clatter (which is supposedely normal), headlamps flicker (ever so slightly, but I notice it, and it is normal also). You pay so much for a vehicle, and then you just have to suck it up I guess. Just like Ford and there numerous issue I hear of with the F-150's transmission, ecoboost engine, electric steering issues (rack replacement), electrical issues, seems like all makes are the same. It sucks!