Quote:
Originally Posted by TruckerChris
I have the same engine as you along with those 3.36 gear but I have a 13spd. It's a fine gear setup to cruise through the midwest at 65+mph and still get good fuel mileage, but as soon I hit even the slightest incline, I lose a tone of speed and have to eventually shift. A couple weeks ago I was climbing cabbage with 43,000lbs and even a heavy hauler passed me... When I decided to run the west coast only, I'm going to regear this truck for sure.
Yep, i have been running Oklahoma, Arkansas, Texas, Mississippi, and Alabama for the last month and am getting about 5.5mpg in this. I just got back home to the midwest today and averaged 7.1mpg from El Paso to Chicago
But again, the loss of power sucks bigtime.
But once I drop out of the 10th into 9th, it dont matter what I'm climbing it will hold it's speed.... guess this is typical with these motors...
All i know is when i was pulling 32K in the Pete, I could run in 13th and never have to downshift over many hills.