View 2 Photos View 0 Videos Mack 673 Flywheel Housing Recently Updated $650 USD 673, Used, P/N 634GC5178 - Part #: 634GC5178, Core Charge: 0.00 ConditionUsedStock Number165496 MLS Number11661015CategoryFlywheel Housings Last Updated8/12/2026 LocationLouisville, KY, US Sold ByRiver City Truck Parts (855) 465-___ SHOWNUMBERCall Seller Email Seller Save More Info