View 0 Photos View 0 Videos 1991 Eaton 22220 Rear Differential for a GMC Topkick Newly Listed $750 USD (USED) Eaton 22220 Ratio: 4.88 Side Gear Splines: 39 W/ Locker: NO Cast#: 107493 ConditionUsedFits To Make(s)GMCFits To Model(s)TopkickStock Number25930526 MLS Number14117651CategoryDifferentials, Rear Last Updated1/30/2026 LocationDes Moines, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info