0 0 Eaton RSP40 Rear Differential for a 2007 Peterbilt 387 $600 USD From Truck#557, Used, Ratio 3.55 locker: NO, Core Charge: 0.00, Ratio: 3.55 ConditionUsedRear End3.55 ratioFits To Make(s)PeterbiltFits To Model(s)387Will Fit Year(s)2007Stock Number165529 MLS Number13125954CategoryDifferentials, Rear Last Updated10/1/2025 LocationLouisville, KY, US Sold ByRiver City Truck Parts (855) 465-___ SHOWNUMBERCall Seller Email Seller Save More Info