Chris Tharpe
New member
I just purchased a 2004 NPR Diesel. The truck runs great and drives great but there is a slight problem. When you are stopped and have the truck in drive, it will not downshift into 1st gear and take off its stuck into 4th gear. To move you must shift down to 1st then proceed to drive and shift up to drive and the truck will function properly after you start moving. Any ideas?