View 0 Photos View 0 Videos 1999 Eaton RSS40 Rear Differential for a Kenworth W900L Newly Listed $1,376 USD (USED) Eaton RSS40 Ratio: 3.70 Side Gear Splines: 41 W/ Locker: NO Cast#: - ConditionUsedFits To Make(s)KenworthFits To Model(s)W900LStock Number25932291 MLS Number14142022CategoryDifferentials, Rear Last Updated2/13/2026 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info