The 1st automotive application with the lock-up principle was Packard's Ultramatic transmission, introduced in 1949, which locked up the converter at cruising speeds, unlocking in the event the throttle was floored for swift acceleration or as the auto slowed. Slippage consumes power during the coupling phase. Locking the converter shell https://torque-converter-clutch43074.topbloghub.com/40321715/5-easy-facts-about-torque-converter-clutch-described