The 1st automotive application in the lock-up theory was Packard's Ultramatic transmission, launched in 1949, which locked up the converter at cruising speeds, unlocking when the throttle was floored for speedy acceleration or because the auto slowed. The Charge of the oil tension inside the lock-up clutch is finished via https://torque-converter-clutch75286.blogoscience.com/40246935/5-essential-elements-for-torque-converter-clutch