View 1 Photo View 0 Videos Eaton DD404 Front Differential for a 2004 Peterbilt 379 Newly Listed Contact for price 2004 PETE 379 EATON 404 FRONT DIFF WITH LOCK, 3.90 RATIO, LOW AIRLEAF SUSPENSION, Serial#: NA, Ratio: 3.90, Casting#: NA ConditionUsedRear End3.90 ratioFits To Make(s)PeterbiltFits To Model(s)379Will Fit Year(s)2004Stock Number3880-PETE-4 MLS Number14095827CategoryDifferentials, Front Last Updated1/17/2026 LocationSTURGEON COUNTY, AB, Canada Sold ByBadger Truck Parts Ltd. (855) 624-___ SHOWNUMBERCall Seller Email Seller Save More Info