0 0 Eaton D40-155 Rear Differential for a 2020 Peterbilt 579 Newly Listed $1,995 USD D40-155 RR 2.64 RATIO GOOD INSPECTED TAKEOUT, Ratio: 2.64 ConditionUsedRear End2.64 ratioFits To Make(s)PeterbiltFits To Model(s)579Will Fit Year(s)2020Stock Number120125-5 MLS Number14015443CategoryDifferentials, Rear Last Updated12/4/2025 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info