With the three-passage torque converter, two passages are used for transmission oil (ATF) circulation through the torque converter and for clutch cooling, even though the third passage is used independently to regulate the lock and unlock with the clutch. Tough idling is an additional widespread symptom of a nasty torque https://torqueconverterclutch00740.bloginwi.com/67948857/torque-converter-clutch-for-dummies