The initial automotive application of the lock-up 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 rapid acceleration or because the motor vehicle slowed. Ultimately, galling of your mating parts occurs, which triggers seizure. https://torqueconverterclutch95838.develop-blog.com/40975892/details-fiction-and-torque-converter-clutch