2015 Sierra 2500HD 6.0 3rd gear shudder

[15DenaliSummit]

Hi guys, was driving my truck the other day and in 3rd gear there’s a shudder under normal acceleration, it’s happened a few times since on two 4 hour drives I’ve taken. The engine rpm doesn’t jump like a slip and there’s no noise associated with it, I just felt kind of a lug/shudder, it’s hard to describe. The truck has 92k on it, tranny fluid is clean and there’s no abnormal temps I see for the trans fluid gauge. What should I go looking for? 

[Zackdarden5]

im experiencing this issue as well, any update?