Axle/gears
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Senior User
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Axle/gears
I have a 2013 F-250 6.2L with 3.73 with locking dif......
1 - What rear axle is in my truck?
2 - Has anyone put 4.56 gears in? Would it be worth doing to pull 15,000#?
3 - I assume I can have the truck recalibrated for 4.30 gears but are the trucks able to be recalibrated with non stock gear package? With my Jeep I was able to recalibrate from 3.21 to 4.56 and I would want the transmission to know what gear it is turning.
I plan on re-gearing the truck I am just not sure what gear I want to go with. An knowledge on the matter will be helpful. I feel I got a great price on the truck and don't mind spending the money to have a better tow experience (although I don't mind the 3.73)
1 - What rear axle is in my truck?
2 - Has anyone put 4.56 gears in? Would it be worth doing to pull 15,000#?
3 - I assume I can have the truck recalibrated for 4.30 gears but are the trucks able to be recalibrated with non stock gear package? With my Jeep I was able to recalibrate from 3.21 to 4.56 and I would want the transmission to know what gear it is turning.
I plan on re-gearing the truck I am just not sure what gear I want to go with. An knowledge on the matter will be helpful. I feel I got a great price on the truck and don't mind spending the money to have a better tow experience (although I don't mind the 3.73)
Senior User
Joined: Jan 2015
Posts: 397
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I'm not sure if you can get higher than 4.30 gears as of yet. Most likely by now you can but when I changed my 2011 from 3.73 to 4.30 that was all I had the option for. No need to recalibrate anything you just have the gears swapped and drive away. Speedo doesn't change or anything. Shifts much nicer now that it is running at a slightly higher rpm too.
Postmaster
Joined: Jan 2012
Posts: 2,693
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From: West of Chicago
It Would not be worth it, you have a Sterling 10.25 rear axle. As stated above it seems the 4.30's are the tallest you can get.
If you want that type of gearing, you need to look into an F450/550
If you want that type of gearing, you need to look into an F450/550
Post Fiend
Joined: Nov 2001
Posts: 6,748
Likes: 118
From: Tallassee, ALabama
It is not a Sterling 10.25. Ford went to the Sterling 10.5 around 1999.
Yukon gears sells a 4.56 or even a 4.88 for your truck.
https://www.yukongear.com/partslist....26+Pinion+Sets
Yukon gears sells a 4.56 or even a 4.88 for your truck.
https://www.yukongear.com/partslist....26+Pinion+Sets
Post Fiend
Joined: Nov 2001
Posts: 6,748
Likes: 118
From: Tallassee, ALabama
Summit Racing has some 4.56 listings. Make sure you get the one for 2011 and up.
https://www.summitracing.com/search/...6%2B4294945298
https://www.summitracing.com/search/...6%2B4294945298
Postmaster
Joined: Aug 2015
Posts: 3,146
Likes: 32
From: Maryville, TN
You don't have to do anything to correct for gearing, only tire size. The computer uses the speed sensor and tone ring that's bolted to the ring gear to determine speed. Tires size is the only thing that will effect this. I would definitely recommend a lower gear for pulling 15k, especially if your running anything bigger than the dinky 245/75r17's. My plans are to go 4.88's. This will get me geared slightly lower with 35's or slightly higher with 37's, than a factory 4.30 truck with 245/75r17's. Which just happens to be what my dad has, and I love driving it.
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