The 1st 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 fast acceleration or as being the motor vehicle slowed. The lifespan of a failing torque converter is unpredictable. https://torque-converter-clutch99641.blog2news.com/34609874/new-step-by-step-map-for-torque-converter-clutch