ok so if you just want to get the better gearing and not add the limited slip, do you still have to do the machining for the axles and the transfer case?

Basically Im asking is there any way to just drop the 4.10s out and pop in 3.64s?

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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards