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306 Posts
I have the automatic with 15000 miles on it. Ever since I bought the truck it down shifts hard from 2nd to 1st when I am slowing down to a stop. Around 5 miles an hour. Sometimes harder then other times. Sometimes not at all. Its hard to describe but it does make some noise and a slight jerk when it does it. My dad and buddy both had allison trannys in there chevy trucks that did the exact same thing. My dad sold his with 175,000 and my buddy totaled his with about 130,000. Neither one of them had any issues. So when I got this truck and it did it from day one, I assumed it was normal. I would like to know if there are any other 6.7 with the auto trannys doing the samething.