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9" ring &pinion 9" ring &pinion
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Old 10-21-2009, 12:56 PM
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Join Date: Oct 2009
Posts: 1
9" ring &pinion
I have 57 ford with 4.11 r&p &3 speed manual with 312 motor will only run
about 55 mph on highway. how high of a ratio can i go to is a 3.00 or 2.50
to much to pull the truck will not be hauling any thing or pulling .

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Old 10-21-2009, 03:48 PM
glc glc is offline
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Join Date: Dec 2006
Location: Joplin MO
Vehicle: 2003 Ford F150
Posts: 9,201
What size rear tires is on that thing?
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2003 F150XL 4.2 short cab/bed 4x2 5 speed manual 3.55 LS
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