View 6 Photos View 0 Videos Eaton RS463 Rear Differential for a 2001 Peterbilt 378 Contact for price Eaton RS463 rear-rear Housings For Sale. Ratio 3.90. Locker. Call for details we ship everywhere., Ratio: 3.90 ConditionUsedRear End3.90 ratioFits To Make(s)PeterbiltFits To Model(s)378Will Fit Year(s)2001Stock NumberPT-0644-6 MLS Number10781326CategoryDifferentials, Rear Last Updated6/19/2026 LocationYork, ON, Canada Sold ByLomoca Inc. (833) 835-___ SHOWNUMBERCall Seller Email Seller Save More Info