View 2 Photos View 0 Videos Allison MT643 Transmission $1,500 USD Allison MT643. Locked up. S/N FZ3453 - Input Shaft: YES, Core Charge: 0.00 ConditionUsedPart NumberFZ3453Stock Number144219 MLS Number12213913CategoryTransmissions Last Updated6/13/2026 LocationLouisville, KY, US Sold ByRiver City Truck Parts (855) 465-___ SHOWNUMBERCall Seller Email Seller Save More Info