The primary automotive software on the lock-up theory was Packard's Ultramatic transmission, introduced in 1949, which locked up the converter at cruising speeds, unlocking when the throttle was floored for quick acceleration or as the car or truck slowed. M (highest efficiency point): in this position the torque converter hits https://emilianocujxj.dgbloggers.com/34420017/considerations-to-know-about-torque-converter-clutch