Situations of Reduced launch oil pressure: Motor stall in gear or idle rpm cycling, trans temp increase at idle in push, low cooler flow, harsh coast downshifts, transmission lube circuit distress. The matching curve on the turbine blades can help to properly direct the returning fluid towards the stator Therefore https://emilianogihea.pointblog.net/what-does-torque-converter-clutch-mean-78217729