Back in the year 2000, the E65 BMW 7-Series was the first car to offer a 6-speed automatic transmission. They used the ZF 6HP26 transmission, which they purchased from the transmission supplier ZF Friedrichshafen AG. This well known German automotive component manufacturer was originally started in 1915 to make gears for the now-infamous Zeppelin airship. … Continue reading ZF 6HP26 Transmission Problems & Specs