The torque converter clutch solenoid is a standard part that fails in the automatic transmission. The solenoid valve controls the fluid pressure in the hydraulic transmission, which enters the lock-up clutch. If you notice the transmission slipping, as in failing to succinctly move from the gears, a failing torque converter https://torqueconverterclutch75296.mdkblog.com/40100486/torque-converter-clutch-for-dummies