View 0 Photos View 0 Videos Eaton 23221 3.90 Ratio Gear Set, Part # 104400 Recently Updated $385 USD Used 23221 3.90 Ratio Gear Set - Part # 104400 ConditionUsedRear End3.90 ratioStock Number4540913 MLS Number13896220CategoryDifferential Misc. Parts Last Updated4/21/2026 LocationFresno, CA, US Sold ByGarabedian Equipment (855) 794-___ SHOWNUMBERCall Seller Email Seller Save More Info