Torque Converter Lockup Control System

Torque Converter Lock-Up Control System

Gaining the ability to lock-up your torque converter has some very significant benefits for those who tow a caravan or go offroad. Check out the video and details below to see how it can improve your 4WD experience.

Are any of these situations bothering you?

  • Do you want 100% engine braking in descents when towing?
  • Do you hate brake fade due to having to brake excessively on descents?
  • Is your caravan draining your fuel tank?

YES? Then we have the answer

  • Majorly reduce your fuel consumption while towing on the open road – you will get 2L to 6L per 100km (!) reductions in consumption (varies depending on transmission).
  • Gain 100% engine braking for difficult descents (just like a manual) on road and off road.

Note: 100% engine braking via 1st gear lockup is available on some stock transmissions. However, all transmissions running our Nomad Heavy Duty Valve Body can activate lockup in first gear. We recommend an upgrade if you haven’t already!

With 15 years of proven history, the Wholesale Automatic Transmissions GENII Torque Converter Lockup Kit is the only system that has it’s own ECU that mimics the factory ECU output to ensure solenoid longevity.


  • Built in ECU to mimic the factory ECU output
  • On Board Diagnostics and Automatic Failsafe mode
  • OEM Styled Switches to match your existing factory switches
  • Backed by Australia’s Leading 4WD Automatic Transmission Workshop

How does it work?

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.

it can quite often cause frustrations to the driver as the factory ECU appears confused

Due to most vehicles being manufactured and tested to be operated on sealed roads in suburbia, the torque converter clutch usually works perfectly. However when the vehicle is in towing and/or offroad conditions, it can quite often cause frustrations to the driver as the factory ECU appears confused and is constantly changing the state of the torque converter clutch. With the assistance of the GENII Torque Converter Lockup Control System, the driver can override the torque converter lockup circuit providing a relaxed and enjoyable driving environment.

The operation of the GENII Torque Converter Lockup system is designed not to impact the vehicle’s standard operations in any way. We have specifically designed it so that when the system is off or unpowered, the torque converter circuit is operating under the factory standard ECU with no modification to the circuit. When you activate our GENII Torque Converter Lockup system, the in built ECU takes over control of the torque converter clutch circuit. Providing the factory ECU with a signal that mimics the solenoid and preventing any diagnostic lights from coming up on the dashboard.

The system can be purchased as a self install kit with easy to follow wiring schematics for each vehicle. However, if you are not that familiar with a soldering iron then installation is available at our head office in Bayswater, Melbourne or one of our many fitting agents around Australia.

It’s that easy

Once installed, the operation is as easy as pie. It’s just ONE button. Press the button when you want to override the factory lockup control. Then press again when you want the factory ECU to take back control. It’s that easy.

“Improved fuel economy when towing 3.5 tonnes by 4 litres per 100km. So glad I installed this product. Cheers guys.”

Tony (Owner of LandCruiser 100 Series 5 Speed)


Custom Made OEM Styled Switches

The user experience is always an important factor with any product and the GENII Torque Converter Lockup Kit is no different. Custom made to work with our system, the OEM styled switches are available for most popular vehicles. Also available with a standard carling rocker switch.

View Lock-Up Kits suitable for your specific vehicle: