Rear End Ratio
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Senior User
Joined: Feb 2004
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From: Kansas
Rear End Ratio
My son has a 1993 F250 supercab 2x4. with the 460 engine. he is only getting around 10 miles to a gallon. He was wondering if we could change the rear end ratio to get better MPG. I am still not sure what ratio he has, the tag on the axle says (10 10 2 3 F15). Can any one tell me what my options might be. He really loves the truck, but he is going to need to drive into the city for work. The gas prices will eat his pay check. It is a good sound truck, with low miles (55,000)
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Joined: Dec 2002
Posts: 3,959
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From: USA
Justin is right, 10mpg is about what you can expect from a big block. Does the truck have overdrive?
If he is using this truck as a daily driver and not transporting a heavy load requiring a 3/4 ton truck with him to work and has a few miles to cover, I suggest he pick up a small 4 cylinder car or mini truck or a motorcycle to ride to work and save the truck for when he needs to haul something. That's what I do with my F350. It sits at home all week getting excellent gas mileage and comes out on the weekends to play (and eat gas).
The vehicle VIN and weight sticker on the door jamb will have an axle code and that code can be looked up in the 'tech articles' section of this website under 'axle decoder'.
Are you sure there is not a '4' in front of one of those '1's on the tag? The likely gear ratios for that truck are 3.55 or 4.10.
If he is using this truck as a daily driver and not transporting a heavy load requiring a 3/4 ton truck with him to work and has a few miles to cover, I suggest he pick up a small 4 cylinder car or mini truck or a motorcycle to ride to work and save the truck for when he needs to haul something. That's what I do with my F350. It sits at home all week getting excellent gas mileage and comes out on the weekends to play (and eat gas).
The vehicle VIN and weight sticker on the door jamb will have an axle code and that code can be looked up in the 'tech articles' section of this website under 'axle decoder'.
Are you sure there is not a '4' in front of one of those '1's on the tag? The likely gear ratios for that truck are 3.55 or 4.10.
Last edited by SoCalDesertRider; Mar 10, 2004 at 09:49 PM.
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Joined: Dec 2002
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From: Billings MT
It sounds to me like this is an automatic. My '90 will get 12-13mpg at 75 with a slide in camper. I really wouldn't invest $500-600 for gears in hopes of another 2 or 3 mpg. I would look at how many miles is driven per year. Figure out how many gallons of gas that it at current MPG and then figure out at 2-3mpg more. You'd be surprised at how long the payback would be.
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