14 0 Meritor-Rockwell MT40-14X Rear Axle Assembly for a 2019 Peterbilt 579 $2,500 USD Good used Meritor/Rockwell MT-40-14X Rear axle assembly from a 2019 Peterbilt 579 truck. The rear axle assembly has been visually inspected and is in good condition. The ratio is 2.85. The... ConditionUsedFits To Make(s)PeterbiltFits To Model(s)579Will Fit Year(s)2019Part Number240316-24Stock Number240316-24 MLS Number13810874CategoryAxle Assemblies, Rear Last Updated9/13/2025 LocationKankakee, IL, US Sold ByRiver Valley Truck Parts (844) 604-___ SHOWNUMBERCall Seller Email Seller Save More Info