The torque converter clutch will come into action to mitigate the inherent inefficiency on the fluid coupling at bigger speeds. F (absolutely free-circulation level): at this stage there is no load about the turbine, the velocity ratio is extremely near to one, meaning the turbine pace matches the impeller pace; https://traviswfknn.blog-eye.com/34383694/not-known-details-about-torque-converter-clutch