This feature was also present in certain Borg-Warner transmissions manufactured through the 1950s. It fell away from favor in subsequent a long time as a result of its added complexity and cost. Inside the late seventies lock-up clutches started to reappear in reaction to calls for for improved gasoline economy, https://martinopomj.wizzardsblog.com/33923711/not-known-factual-statements-about-torque-converter-clutch