1 0 Meritor-Rockwell RR20-145 Rear Differential for a 2012 Peterbilt 587 $720 USD Used, good condition, Serial#: C05-210101HHK00342, Ratio: 3.42, Casting#: C05-210101HHK00342 ConditionUsedRear End3.42 ratioFits To Make(s)PeterbiltFits To Model(s)587Will Fit Year(s)2012Part Number030P-300-CACStock NumberP-6 MLS Number12482299CategoryDifferentials, Rear Last Updated11/14/2025 LocationBlue Island, IL, US Sold ByDMC Logistics (833) 657-___ SHOWNUMBERCall Seller Email Seller Save More Info