Four-Speed transmissions have been built since 1936 in several versions. They were included on bikes with Knuckle engines, Pans, Shovels and some 1984 and 1985 Evolution 80's. With Andrews four-speeds gears, transmissions last longer, shift faster and just plain run better.
Three types of countershafts fit transmissions through 1985. Countershafts are not interchangeable, take care in ordering.