View 3 Photos View 0 Videos 1994 Eaton 21065S Rear Differential for a GMC Topkick $750 USD (USED) Eaton 21065S Ratio: 4.33 Side Gear Splines: 41 W/ Locker: NO Cast#: NA BAD YOKE ConditionUsedFits To Make(s)GMCFits To Model(s)TopkickStock Number25807579 MLS Number13629062CategoryDifferentials, Rear Last Updated6/6/2025 LocationWinimac, IN, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info