View 0 Photos View 0 Videos 1992 Eaton RS402 Rear Differential for a Peterbilt 377 Recently Updated $936 USD (USED) Eaton RS402 Ratio: 4.11 Side Gear Splines: 41 W/ Locker: NO Cast#: 123109-C ConditionUsedFits To Make(s)PeterbiltFits To Model(s)377Stock Number26001317 MLS Number14387253CategoryDifferentials, Rear Last Updated7/10/2026 LocationDes Moines, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info