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Discussion Starter · #1 ·
IM LOOKING TO DO A GEAR SWAP ON Rear diff on my 5.7. Is the 3.90 compatible? I’ve hear only the m6 but I’ve hear the a8 is to so I’m confused.
 

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I have seen posts where people swap the posi diffs from the Scat Packs, and or Hellcats into their Charger R/Ts
Either here or the other Charger forum.

So the A8 won't have a problem with it. I can't remember if you have to change a gear ratio value somewhere or if the computer uses so.ething else to "know" the gear ratio
 

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Discussion Starter · #3 ·
I have seen posts where people swap the posi diffs from the Scat Packs, and or Hellcats into their Charger R/Ts
Either here or the other Charger forum.

So the A8 won't have a problem with it. I can't remember if you have to change a gear ratio value somewhere or if the computer uses so.ething else to "know" the gear ratio
Ohk thanks! I’m new to the mopar family, AND it’s mods. So feel free if you have any suggestions. I’m bone stock right now
 

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2017 Dodge Charger R/T
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