View 2 Photos View 0 Videos Mack 673 Flywheel Housing Recently Updated $650 USD 673, Used, P/N 634GC5178, Core Charge: 0 ConditionUsedPart Number634GC5178Stock Number165496 MLS Number11661015CategoryFlywheel Housings Last Updated5/14/2026 LocationLouisville, KY, US Sold ByRiver City Truck Parts (855) 465-___ SHOWNUMBERCall Seller Email Seller Save More Info