Quote Originally Posted by truk4u View Post
I don't understand the need for an upgrade! I had two series 60's, they had plenty of power, good on fuel and were about as reliable as you can get. I've heard of folks having a catastrophic engine failure way out of warranty and DD stepped up and helped with the cost. Do you suppose they would be willing to offer that assistance to the engine that has been modified with chips or whatever? I don't think so.
I spoke with a DD service center manager and he recommended against reflashing my DDEC IV to go from 1550 ft-lb of torque to 1600 ft-lb. This is a DD upgrade. He was concerned that my Allison World 4060HD transmission may not be up to the task. Now, some of this may by CYA, but I too have to ask, if there's a simple fuel map reprogramming that increases fuel mileage by 15% I'd think DD would be all over it. Show me the numbers.... I'd like to see 7500 miles of cross country driving with actual gallons pumped and miles traveled. Skeptical...