Torque Converter Lock-Up Kits

The torque converter is a device that sits between the engine and the automatic transmission. It is referred to as a fluid coupling with an unlocked or free spinning mode and a locked or engaged mode. The transmission ECU automatically controls when the torque converter is switched between these two modes.

When your vehicle is travelling in a situation where the ECU calculates that the torque converter lockup can be applied, a solenoid is activated, sending oil pressure to act on a clutch inside the torque converter, which in turn 'Locks' the engine output shaft and transmission input shafts together so they spin at the same speed. This primarily is to reduce heat build up and also reduce fuel consumption.