2 0 Eaton DT485P Front Differential for a 1987 Peterbilt 379 $2,495 USD DT461P 456 2 SPEED GOOD INSPECTED TAKEOUT. 90 DAY WARRANTY EXCHANGE, Ratio: 4.56 ConditionUsedRear End4.56 ratioFits To Make(s)PeterbiltFits To Model(s)379Will Fit Year(s)1987Stock Number52922-8 MLS Number11477861CategoryDifferentials, Front Last Updated2/13/2025 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info