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Gas Engines Discussion of the gas engines available in the 1999-2007 Super Duty trucks

       
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Old 08-31-2001, 10:30 PM   #1 (permalink)
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4.56 gears!

I looked around and found a decent price on 4.56 gears for my V10 CC 4x4. I could run larger tires and wind up with a 4.3 ratio! [img]images/icons/wink.gif[/img] I imagine these suckers would pull like a dream. Then there's the economy part... [img]images/icons/shocked.gif[/img] But oh the acceleration...! [img]images/icons/laugh.gif[/img]

Anyone out there running 4.56s?

Dan
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Old 09-01-2001, 01:33 PM   #2 (permalink)
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Re: 4.56 gears!

where is your source? Share with us. That is just what I want!! [img]images/icons/laugh.gif[/img] Bigger tires and not lose much power(as I don't have alot to lose [img]images/icons/wink.gif[/img])
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Old 09-01-2001, 10:17 PM   #3 (permalink)
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Re: 4.56 gears!

Yes, on a 79 chevy with a 85 cucv undercarriage. The truck has a 4 speed manual and a extremely souped up 305. It will pull a house, but it only gets 8 to 11 mpg, that is probably due to the fact that it does not have overdrive. It runs about 3100 rpm at 65. I really like the gears and the positrac that the military used. Hope all is well, Mason
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Old 09-01-2001, 11:19 PM   #4 (permalink)
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Re: 4.56 gears!

sloans 4x4,

Try FATBOYZ 4X4 in Wichita. They do excellent work and are great to work with.

The 3.73 to me seem too weak a ratio for this heavy a truck. I love the power of the V10 and would love to see it better used with the lower gears.

I presume the OD would allow for similar gas mileage on the road, but the take off and towing would increase to almost mind-blowing level! [img]images/icons/wink.gif[/img] Even with 285 or even 305 size tires that combo would be awesome.

Dan
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Old 09-02-2001, 08:36 AM   #5 (permalink)
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Re: 4.56 gears!

Is there a formula or a website that helps you calculate rpm's at different gear ratios with different tire sizes? [img]images/icons/crazy.gif[/img] [img]images/icons/laugh.gif[/img]
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Car nut!!! Also have '65 Mustang Conv.(K-code), '67 Shelby GT-500, '70 Mustang Boss 302, and a '66 Corvette 427/425 Conv. All usually in various states of disrepair!
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Old 09-02-2001, 10:23 AM   #6 (permalink)
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Re: 4.56 gears!

Yes. On Superlift's site they have a tire size/gear ratio chart.
http://www.superlift.com/
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Old 09-02-2001, 10:25 AM   #7 (permalink)
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Re: 4.56 gears!

Ok yeah I drive by there all the time. never stopped though. Wife is usually with!! [img]images/icons/laugh.gif[/img] [img]images/icons/crazy.gif[/img] And she would be ready to go as soon as we pulled in [img]images/icons/mad.gif[/img]
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Western-Diesel dealer for Kansas
2001 F-250 XLT CC, SB, 4x4 offroad, 5.4, auto, 4:10LS, manual hubs and T-case, cab lights, '02 head lights, 295/75/16 BFG AT on 16x10 eagle 1439's, Toreador/silver w/gray cloth, Carbon-fiber kit, Stull Billit grill insert, Ford/Harley bug shield, floor mats, and bed mat. 20% tint on front windows and 20% tint over the factory tinted rear windows and 20% tinted strip on front windshield

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