View 5 Photos View 0 Videos Mack CRDP150 Rear Differential for a 2020 Mack Pinnacle Newly Listed Contact for price (Used) 2020 Mack Pinnacle, REAR DIFFERENTIAL GEARS ONLY- Part Number: 21387123, Serial Number: 9230046237, Make: Mack, Model: CRDP150, Ratio: 3.25, Capacity: 20,000 Lbs, Reference images for... ConditionUsedRear End3.25 ratioFits To Make(s)MackFits To Model(s)PinnacleWill Fit Year(s)2020Part Number21387123Stock NumberP-504513 MLS Number14427464CategoryDifferentials, Rear Last Updated6/13/2026 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info