0 0 Spicer S400F Front Differential Newly Listed $2,000 USD Remanufactured Spicer S400F Front, rear differential assembly. 3.21 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered ConditionRemanufacturedRear End3.21 ratioFits To Make(s)SPICERFits To Model(s)S400FStock NumberBP TRS S400F/3.21 MLS Number14050715CategoryDifferentials, Front Last Updated12/18/2025 LocationFitchburg, MA, US Sold ByRydemore Heavy Duty Truck Parts (888) 519-___ SHOWNUMBERCall Seller Email Seller Save More Info