View 3 Photos View 0 Videos 2013 Spicer S21170 Rear Differential for a Peterbilt 384 Newly Listed Contact for price S21-170 - Rear Rear - 3.42 Ratio - Pullout - DIFF ONLY. ConditionUsedRear End3.42 ratioFits To Make(s)PETERBILTFits To Model(s)384Stock Number4418-3 MLS Number14265390CategoryDifferentials, Rear Last Updated3/25/2026 LocationFresno, CA, US Sold ByGarabedian Equipment (855) 794-___ SHOWNUMBERCall Seller Email Seller Save More Info