2012 Ram 1500 gear swap

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regularcab2500

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Idk if it would cost more though since they have to machine it to fit 4.10s anyway...i think your problem lies in the front carrier whether or not it will accept 4.56s
 

kg93

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Idk if it would cost more though since they have to machine it to fit 4.10s anyway...i think your problem lies in the front carrier whether or not it will accept 4.56s
Oh I'm sure it would cost more I didn't include the machining, probably another 500.

If I switch to a 10 or 11 diff It would defintley fit 4.56. The 14..if mines not welded, idk if it could even be machined to fit the 4.56 of the older diffs
 

Wbwillyb

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I have a 2011 with 3.55's. Would the 3.92 swap help mpg? I am getting 10 city and 12 hwy thanks to the 35s and light bar. Thoughts?
 

Paluby

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I have a 2011 with 3.55's. Would the 3.92 swap help mpg? I am getting 10 city and 12 hwy thanks to the 35s and light bar. Thoughts?

On a more serious note, taller gears won't improve mpg. Typically it's the opposite and people see a touch worse mileage.
 

RamAz

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what about swapping from 3.21's to 3.92's on a 4x2?
truck is a 17 express qc 5..
 

crackerjack1957

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I would say it would help with the 35 inch tires & 5/6-speed transmission at speeds under 70 mph.
I have the same in a 2014 with 3:55 with 35 inch tires & it constantly downshifts.
 

Pull Ya

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what about swapping from 3.21's to 3.92's on a 4x2?
truck is a 17 express qc 5..

It should be no problem. All you'd need is parts only. If it were mine I'd do it in a heartbeat!
Jay
 

RamAz

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@Pull Ya I am going to pull the trigger here soon hopefully!


Sent from my iPhone using Tapatalk
 

Pull Ya

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Contact Matt at Moe's Performance. He'll fix you up with everything you need. Excellent preferred vendor on this site.
Jay
 

Wahrsuul

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I didn't know they made a '17 with the 5 or 6 spd, thought everything after '13 had the 8 spd.
 
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