The Transmission assembly is constructed from several parts from which the Retainer,drive Shaft Oil Seal is the most expensive.
In this schematic the "Screw" is used most often.
Parts such as the Transmission: Bearing(22x50x14), O Ring(d:2.5,id:21), Chain Assembly,drive, Bearing(20x42x12) are included in the Lt-f160 Quad Runner 1991 (m) Usa (e03) Quadrunner Quad-runner Transmission parts fiche.