The Transmission (model K4/k5/k6) assembly is constructed from several parts from which the Shaft,counter(nt:15) is the most expensive.
The most reasonably priced component used on the Rm250 2005 (k5) Usa (e03) Transmission (model K4/k5/k6) is the Screw.
Some items from this specific schematic: Bearing(22x56x15), Bush,4th Drive Gear, Shaft,drive, Shim(25x34x1).