0 0 Eaton DD404 Front Differential Newly Listed $2,700 USD New OE Eaton DD404 Front, rear full locking differential assemlby. 3.90 ratio, 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered ConditionNewRear End3.90 ratioFits To Make(s)EATONFits To Model(s)DD404Stock NumberBP TRS DD404/3.90 O MLS Number14050769CategoryDifferentials, Front Last Updated12/18/2025 LocationFitchburg, MA, US Sold ByRydemore Heavy Duty Truck Parts (888) 519-___ SHOWNUMBERCall Seller Email Seller Save More Info