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Cody23879

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I have a 2019 Ram 1500, 5.7L with 3.21 rear gears. I want to swap the gears to 3.92s. Does anyone know what other modifications would be required, if any? Computer reprogramming? Trans cooler? What exactly are the differences from factory other than the gears?
 

Rickyrocket

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I don't know about the electronic part of it but mechanical I would buy a front differential from a wreck,and do a rear gear swap, I say this because some will say its not possible for less than $4000.
 

IvoryHemi

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I would look into what the ratio split is for the carrier
 

Johnmcillwain

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I just done my rear 321 to 392 swap myself for about 1200. Thats gears and a Posi. But i set it up myself
 

R_E_A

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I just done my rear 321 to 392 swap myself for about 1200. Thats gears and a Posi. But i set it up myself
Please go into a little more detail on this. Where did you get the 3.92 front axle? Direct from Ram dealer? Did you program anything else? Thanks in advance for any other info!!
 

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