Gear swap on 2003 dodge quad cab
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Gear swap on 2003 dodge quad cab
Hello, I was just wondering if there is anyone that has completed a rear end gear swap on a 2003 2500 two wheel drive with automatic. I have this truck and it came with 3.73 gear ratio in the rear. I was told by some friends that I could drop to a 3.08 or 3.42 gear ratio and would bring my mileage up 4 to 5 miles per gallon. I do not pull anything more then my four wheeler on a sixteen foot flat bed. I drive on the highway going offshore and back and fourth to town which is 20 something miles away. I run at 65 to 67 on highway and I get 24.3 to 25.2 miles per gallon. Set me straight on this once and for all. Thank you
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A slightly taller tire will help some at no additinal cost at retire time. Slowing down 5 MPH will give biggest bang for no bucks. On a 20 mile drive it increases driving time by two minutes at most. Gear ratio change will never be recouped in most truck lifetimes.
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My 03 (4x4) with 4:10s is still getting not-so-great mileage. I've had it in twice, the first time they replaced all 6 injectors. The second time they reprogrammed the ECU with the latest flash for the 03 5.9 HO. I think I'm being nice to say I'm getting 20 on the highway at ~60mph (2K rpm).
Any other ideas, mileage gurus?
I did make the mistake of putting 265 wide tires (highway, forget the height but it's the stock height) on the truck so I think I have a little more rolling resistance because those are wider than stock... but still... Always looking for more ideas to try...
PS - Yes I did replace the fuel filter recently. Air is practically new too.
Any other ideas, mileage gurus?
I did make the mistake of putting 265 wide tires (highway, forget the height but it's the stock height) on the truck so I think I have a little more rolling resistance because those are wider than stock... but still... Always looking for more ideas to try...
PS - Yes I did replace the fuel filter recently. Air is practically new too.
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