I've got a 2012 F250 with 75K on the clock. The truck belonged to my Dad and it's been maintained by the book since he purchased new. 1st thing in the morning when the fluid is still cold I get a slip or shudder of sorts when taking off and going from 1st into 2nd. It happens 1 time in the morning and then it's fine until the next morning. No codes, no CEL and no other problems. Any thoughts?