ZF 4HP16 FWD Four-Speed: The obscure ZF transmission
For decades, ZF, the German transmission manufacturer, has been cranking out an array of automatic and manual transmissions, from basic three-speeds to cutting-edge eight- and nine-speed automatics. The company has been first to market with several innovations now used by most OE manufacturers in one form or another. Not all of its development projects, however, have been familiar to the aftermarket repair industry.
