Some items from this specific schematic: Gear,c-3, B/brg Rad N/com, Gear,m-3 M-4, Brg,ndl.20x24x10.
This TRANSMISSION assembly utilises three Washer Spline 28x(s) - the highest specified component.
The lowest price component in this Transmission parts-list fiche is the Bolt,flange 6x14.