View 0 Photos View 0 Videos 1991 Eaton 22220 Rear Differential for a GMC Topkick Newly Listed $750 USD (USED) Eaton 22220 Ratio: VERIFY Side Gear Splines: 46 W/ Locker: NO Cast#: 107493 ConditionUsedFits To Make(s)GMCFits To Model(s)TopkickStock Number25977469 MLS Number14309778CategoryDifferentials, Rear Last Updated4/15/2026 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info