I have 5600 miles on my truck and the 2nd to 3rd gear shift has gotten progressivly worse. It is impossible to make the first 2nd to 3rd shift of the day without grinding. Once it warms up I can get a clean shift if I go rrrrreal slow and easy. I've changed the fluid and that doesn't seem to help at all. If it doesn't start cleaning up I'm going to take it in to the dealer. It's gotten so bad I worry every time I have to make that shift, I don't like grinding gears in a new 40K truck.
Gino