I hope this is posted in the correct place. First off I have a 2004 5. 9 Ho 3. 73 gears. I am getting about 17-19 mpg. This guy who owns the local hardware by me has 1999 cummins. He claims he is getting 30-34 mpg,s. I get talking to him,he claims he ordered the truck new with 3. 15 allison gears. Is this BS ?? Just courios. The truck has 100,000 miles on it. He claims dodge called him up a year later to see if he liked the gear ratio,first one they ever sold. Sounds kind of fishey to me. coobie
