Current axles are AAM
HD pickup front axles is 9.25
CC front axle is 10.5
Standard rear axle is 11.5" ring gear.
Only the HO trucks have a 12" ring gear. the 12" axle has 4" tubes. These are necked down at the spindle for the SRW 8-lug hubs.
The DRW Max Tow (reportedly) has larger rear rotors and calipers.
Standard caliper is 360mm.
Max Tow caliper is 365mm.
Standard transfer case is electronic (BW 44-46) or manual shift (BW 44-47)
HO/AISN trucks have a larger transfer case; Borg Warner BW44-48
"Ram Heavy Duty trucks with the high output version of the Cummins 6.7-liter Turbo Diesel are equipped with an all new
part-time BorgWarner transfer case (BW 44-48). This transfer case is designed to handle the higher input loads
for maximum towing capability up to 35,100 lbs."
https://media.fcanorthamerica.com/pdf.do?id=20519
HD pickup front axles is 9.25
CC front axle is 10.5
Standard rear axle is 11.5" ring gear.
Only the HO trucks have a 12" ring gear. the 12" axle has 4" tubes. These are necked down at the spindle for the SRW 8-lug hubs.
The DRW Max Tow (reportedly) has larger rear rotors and calipers.
Standard caliper is 360mm.
Max Tow caliper is 365mm.
Standard transfer case is electronic (BW 44-46) or manual shift (BW 44-47)
HO/AISN trucks have a larger transfer case; Borg Warner BW44-48
"Ram Heavy Duty trucks with the high output version of the Cummins 6.7-liter Turbo Diesel are equipped with an all new
part-time BorgWarner transfer case (BW 44-48). This transfer case is designed to handle the higher input loads
for maximum towing capability up to 35,100 lbs."
https://media.fcanorthamerica.com/pdf.do?id=20519