The 1st automotive software with the lock-up basic principle was Packard's Ultramatic transmission, launched in 1949, which locked up the converter at cruising speeds, unlocking in the event the throttle was floored for fast acceleration or given that the auto slowed. M (highest performance point): During this stage the torque https://torque-converter-clutch92468.thechapblog.com/33118109/facts-about-torque-converter-clutch-revealed