If you swap you will have to adjust the PCM for it so you dont get a Limp Mode or speed mismatch issue.

 

I think for the 2015+ cars no tuning is needed. Post #6/#7 report that speed is pulled from the front wheel sensors.

3.09 to 3.9 rear diff swap.

I have a 2018 Scat Pack, Auto Trans. I know these come with the 3.09 rear end. Would my 0-60 be faster if I swapped to the 3.9 that they put in the Manual Trans. or would I screw the gear ratios up because of the size of the auto trans gears? Don't care about mpg, just want faster easier...

www.challengertalk.com

 

Window Stickers & Build Sheets can be so confusing. they seem to list what you have and what you don't have, LOL
It's that dam line they throw in on the window sticker... STANDARD EQUIPMENT (UNLESS REPLACED BY OPTIONAL EQUIPMENT)

 

You've got Performance Handling Group so that's a notch above Super Track Pack.

You also have the Scat Pack 3.09 limited slip diff.

You've basically got a Scat Pack with the 5.7L.

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You've got Performance Handling Group so that's a notch above Super Track Pack.

You also have the Scat Pack 3.09 limited slip diff.

You've basically got a Scat Pack with the 5.7L.

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@Slidd very interesting build sheet he has. I have a question about my wife's 22 Charger R/T. Hers also has the Performance Handling Group: Build Sheet States it has Super Track Pack, but for the rear end it says:

2.62 REAR AXLE RATIO
220MM REAR AXLE
CONVENTIONAL DIFFERENTIAL REAR AXLE

Under the Option Section it says PERFORMANCE HANDLING GROUP but never mentions a different rear end, like the original poster has in his build sheet.

I wonder why the difference between 2 cars with the same Performance Handling Group option. Does her Charger R/T have a the open rear diff then?