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Old Feb 24, 2011 | 07:48 PM
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foegezach's Avatar
foegezach
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New gearing

pretty soon i will be getting 37 inch tires and i am just wondering what gearing i will need in the differental thanks all
 
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Old Feb 24, 2011 | 07:56 PM
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wow thats a big tire! How much lift do you have on your truck?

I think you would want to go to 4.56 gears though to move them well.
 
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Old Feb 24, 2011 | 10:28 PM
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i have a 6 inch fabtech suspension lift and ill be putting on a 3 inch body lift this october then the 37 im in the military in texas and all the ****s at home in wisconsin so i gotta wait to put it on oh and will i have to get a differnet dif cover for it to
 
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Old Feb 25, 2011 | 07:04 AM
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I second that you'll want a 4.56 at least, if not more.
 
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Old Feb 25, 2011 | 09:34 PM
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I bet you have to use a step stool to get into the cab....huh?
 
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Old Feb 25, 2011 | 11:30 PM
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Found this a couple weeks ago on a FTE sponsers website

What Gears Should I Buy? at AmericanTrucks.com - Free Shipping!


I'm curious as to how hard it is to regear my 4x4 f150 to 4.10s myself


-ruli00
 
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Old Feb 25, 2011 | 11:52 PM
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From what I understand its not too bad to either have your truck regeared or if you are handy with the wrench then to do it yourself.


If you are putting that large of a tire and plan to do some off roading then I would go ahead and upgrade the diff cover even if you don't have to.
 
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Old Feb 26, 2011 | 07:00 PM
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yeah i was planning on it also i am wondering what is the lug nut size on pro comp xtreme wheels 17 inches i cant find it anywhere if yall could do some researching for me and help me out agian ive used all my resoarses
 
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Old Feb 26, 2011 | 07:38 PM
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Gear swaps are not something a backyard mechanic should attemp.You don't want to have to buy gears and master install kits twice.Plus if you replace carrier bearings you will need a press.
 
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Old Feb 27, 2011 | 05:46 PM
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I have 35" tires and still have the 3.73 in the rear. I'm sure new gears would help but it isn't a dog by any means.
 
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Old Feb 28, 2011 | 07:26 PM
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regearing a ford diff is not hard at all, definitely pick up a tech manual, and as long as you have the right tools, you can knock it out in your garage in a weekend. ford rears are definitely less of an a** pain than chevy or mopar rear ends.
 
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Old Feb 28, 2011 | 08:05 PM
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Originally Posted by dusty d
regearing a ford diff is not hard at all, definitely pick up a tech manual, and as long as you have the right tools, you can knock it out in your garage in a weekend. ford rears are definitely less of an a** pain than chevy or mopar rear ends.
Not hard for somebody that's done it before but the front diff is a PITA on a 4x4 with IFS.
 
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Old Mar 4, 2011 | 04:21 PM
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thanks guys i think i am going to go with a 4.88
 
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Old Mar 9, 2011 | 12:40 PM
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Gear Ration Chart

4.88's should do good for you.

I found this link on another thread. It should help anyone who is looking at regearing or changing your tire size. Check it out...

Differential Gear Ratio Chart - Tire Size to Gear Ratio
 
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