View 4 Photos View 0 Videos Dana D40-155H Rear Differential for a 2020 Peterbilt 579 Newly Listed Contact for price (Used) 2020 Peterbilt 579, REAR DIFFERENTIAL GEARS ONLY- Part Number: 10032384, Serial Number: HN07787569, Make: Spicer, Model: D40-155H, Ratio: 2.79, Capacity: 19,000 Lbs, Reference images... ConditionUsedRear End2.79 ratioFits To Make(s)PeterbiltFits To Model(s)579Will Fit Year(s)2020Part Number10032384Stock NumberP-504233 MLS Number14427201CategoryDifferentials, Rear Last Updated6/13/2026 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info