Parts such as the Transmission: Collar(3fa), Bearing, Washer, Lock (23x), Axle, Drive (40t) are included in the Yfa1n/nc 2001 Usa Except California California Transmission parts fiche.
The lowest price component in this Transmission parts-list fiche is the Bolt,socket.
The Transmission assembly is constructed from several parts from which the Counter Axle Assy (15t) is the most expensive.