Marlin Czajkowski, owner and CEO of Toyota-specific California-based rock crawling company Marlin Crawler, Inc., invented and popularized an A-through-E nomenclature system for 1985–1995 USA-market W56 transmissions. These include the W56-A (1985), W56-B (1986–88), W56-C (1989–91), W56-D (1992), and W56-E (1993–95) variants of 4WD Toyota Hilux Pickup and 4Runner W56 transmissions. This system is used to distinguish between the five major design changes Marlin has identified throughout this year span. Diesel powered sedans and station wagons featured the W56 as well as some commercial class vehicles such as the Cressida 4 cylinder models.