gearing recommendations
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Freshman User
Joined: Jun 2010
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gearing recommendations
hey guys
just wondering if anyone can help me out with gearing recommendations for my truck the gears are stock right now.
i have a 06 f 350 with a carli lift and 38 inch tires
head studs, egr delete, idp street tunes and mtw hybrid turbo
i dont tow often but do probably equal city and highway driving.
also im up and down logging roads fairly often.
i would definitely like to see it quicker off the line.
thanks
just wondering if anyone can help me out with gearing recommendations for my truck the gears are stock right now.
i have a 06 f 350 with a carli lift and 38 inch tires
head studs, egr delete, idp street tunes and mtw hybrid turbo
i dont tow often but do probably equal city and highway driving.
also im up and down logging roads fairly often.
i would definitely like to see it quicker off the line.
thanks
Lead Driver
Joined: Feb 2011
Posts: 8,241
Likes: 155
From: L.A. (Lower Alabama)
So currently you're running the factory 3:73 (axle code 3L on the door sticker)?
Here's a handy chart with all the Ford axle codes:
Ford F-250/350 Series Gear Ratios
Here's a handy chart with all the Ford axle codes:
Ford F-250/350 Series Gear Ratios
More Turbo
Joined: Feb 2005
Posts: 574
Likes: 3
From: Grand Rapids,MI
4:10-4:11 would allow you to go to 40" if you want probally, better mpg in city. should bring you rpm's up to what you stock rpm's were with stock tires. A true 4x4 shop or speed shop could help you out better.
Senior User
Joined: Aug 2010
Posts: 216
Likes: 0
From: Duncan, OK
What rpm are you turning at 65mph? I run stock size 235-85-16 (31 inches tall) with factory 4:10 gears, and my truck is a beast off the line. At 65mph its turning 2000rpm on the nose. With you running 38"s I would think you would need to go lower than 4:10... Maybe 4:56 would be closer to what you need.
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moose94
Clutch, Transmission, Differential, Axle & Transfer Case
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Aug 27, 2003 11:27 AM
