Alright guys I am new to this so I will try and get through it the best I can. I have an 2008 3500 4x4 mega cab. It has the 6.7 with auto tranny. My issue is going fron 3rd to 4th gear it makes a noise that the best way to describe it is it sounds like tires chirpping when you leave hard. It only does it inbetween 3rd and 4th and there is no slipping that it is appearent. Does anyone have any idea. It is the 68rfe six speed.