Thread: Fuel Mileage
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Old 07-08-2008, 02:20 AM   #10
art leong
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Location: Richmond Hill, Georgia
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Default Re: Fuel Mileage

Quote:
Originally Posted by Philip Saran View Post
Art, would it be worth the $600 - $1000 to regear that beast of a truck (F550)?
or would it just take away too much torque and take too long to recoupe the
investment?

My F350 diesel (6.0) has 4:10 and 285/75R16 tires and seems to do about
9 to 12 mpg depending on how many hills we climb with a 7.5K load.
I suppose if I went back to the stock 265/75R16 tires that might help a bit.

But it's not capable of getting the kind of milage the Dodge diesles seem to
get at all.
Originally I looked at getting a lower (numeric) rear end ratio. But the rear I have dana 135S full floater.
Very very expensive $900 for the gears alone. Plus I'm afraid of hurting the tranny. I've heard a lot about tranny woes ($5000 for a good one)with these fords, and it seems like its all about lugging them down. With the setup I have now I can go up most bridges in overdrive.
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