Edmunds dealer partner, Bayway Leasing, is now offering transparent lease deals via these forums. Click here to see the latest vehicles!
Ford Expedition MPG and Gear Ratios
Heres the deal. My sister and I have the same truck. 2004 Eddie Bauer Expeditions. Both are 4x4 and both 5.4l. She followed us up north one weekend. We both used cruise control so we had identical driving situation. She only got 14.2mpg and I got 16.6mpg (actually calculating out the mileage) The only differance between the trucks is that I have 3.73 gears and she has had 3.31 installed several years ago. Do you think mileage will go up more on these with 4.10 gears?
0
This discussion has been closed.
Comments
Did you both use the same kind of gasoline? Do you both change your oil at regular intervals and use the same type? Are your tires inflated properly and identically? Did you both use air conditioning? Anyone have cargo racks? Use 4WD? Did the vehicles carry equal loads?
tidester, host
SUVs and Smart Shopper
Nearly everything else was identical.
I have noticed that it doesnt matter if you drive 65mph or 85 mph. My mileage is always around 16.6 highway when I calculate it. My thinking is that getting the rpm up just 100-150rpms or so to increase engine torque is enough to compensate for increased wind resistance. I would also think that if the rate of acceleration was the same, but with 4.10 gears, the truck wouldnt have to work as hard, therefore decreasing the fuel consumption in city driving?
I do know that the cylinder deactivation in the GM trucks are working better with the 4.10 gears vs the 3.73. The 4 cylinder mode engages more often and is able to hold that mode under more acceleration with the 4.10. The consensus is that the engine rpm is a little higher and producing more torque
So I am wondering if anyone has actually done a 4.10 front and rear gear swap in their Expeditions and seen an increase in MPG. I have found front and rear gear sets for about $300