View 1 Photo View 0 Videos Dana-Spicer DSP 41 Front Differential for a 2003 Peterbilt 379 $1,095 USD GOOD INSPECTED TAKEOUT. 90 DAY WARRANTY EXCHANGE, Axle Spline Count: 41, Serial#: NA, Core Charge: 300, Ratio: 3.90 ConditionUsedFits To Make(s)PeterbiltFits To Model(s)379Will Fit Year(s)2003Part NumberDSP40Stock Number90325-3 MLS Number13810815CategoryDifferentials, Front Last Updated6/13/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info