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1997 - 2003 Ford F150 General discussion on the Ford 1997 - 2003 F150 truck.

4.88's or 4.56's?

Old 01-13-2012, 09:26 PM
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Maybe ill just go with the 4.88s then
Old 01-14-2012, 02:35 AM
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I am running around 2200 at 70 with 456 gears and 35s I would always go lower just in case you can always comp it with bigger tires.
Old 01-14-2012, 02:36 AM
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Originally Posted by MoDy150
4.88's! I've had mine installed for over a week now. My power is back and my MPGs are at ~16 MPG. I also had the Edge Evo CS installed.
Here's a gear chart from quadratec.com

And for RPM at highway speeds, I haven't paid attention. I was averaging 22 MPGs after a 25 Mile trip at ~65 MPH, according to the Edge programmer.
How do you average 22 mpg I get about 13 to 14
Old 01-14-2012, 08:05 AM
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I have the edge programmer and the mpgs on the computer never add up to what I am actually getting on the trip odometer. I was getting 13-14 with my 41s during the summer just with 3.73 gears. I am hoping 4.88 or 5.13s will put me closer to 18.


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