The first automotive application in the lock-up basic principle was Packard's Ultramatic transmission, launched in 1949, which locked up the converter at cruising speeds, unlocking when the throttle was floored for fast acceleration or as the car or truck slowed. Slippage consumes power over the coupling section. Locking the converter https://jeffreyvkykw.laowaiblog.com/32979412/torque-converter-clutch-things-to-know-before-you-buy