How do you lock-up a torque converter?

How do you lock-up a torque converter?

Torque converter lock-up is engaged through a solenoid mounted inside the transmission. This clutch acts just like a clutch disc in a manual transmission application. When the converter is “locked up” this clutch is forced against the front of the converter creating a direct drive from engine to transmission.

At what speed does a torque converter lock-up?

This energy loss is transmitted to the vehicle’s radiator and shed as heat. Recently developed torque converters have had a “lockup” feature added to reduce this energy loss and improve mpg. This lockup feature will not engage until the vehicle reaches approximately 40 mph.

What causes a torque converter to lock-up?

However, when the engine turns more slowly it causes the torque converter to slip, creating heat. Slipping reduces fuel economy and heat can damage the converter and the transmission. The solution is to lock the converter. Lock-up eliminates the slippage, which reduces heat and improves fuel economy.

How does torque converter clutch solenoid work?

The solenoid moves a valve that sends pressurized fluid to the clutch circuit, engaging the TCC. When the clutch is disengaged, the torque converter allows the engine to rotate without stalling. While the vehicle is slowing and approaching a stop, the TCC’s application is undesirable.

How do I know if my torque converter is locked up?

Put the pedal to the metal While pressing on the brake pedal, press the accelerator to the floor for two to three seconds. Don’t exceed five seconds, or you risk blowing out the transmission. The RPM the engine maxes out at is the stall speed.

What causes torque converter to lock up?

Is there a way to unlock the torque converter?

Unlocking the torque converter is achieved by disconnection of the +12 volts, or the transmission downshifts out of 4th gear. We also include a cruise control style brake switch that works perfectly to disconnect the +12 volt power to the lock up module when the brakes are applied.

How does the torque converter lock up on a 700R4?

Torque converter lockup on the 700R4 transmission is controlled by the TCC solenoid. When the solenoid is engaged, fluid is applied to the torque converter clutch, creating lockup and a direct link between the engine and transmission.

How do you install a toggle switch on a Jeep Cherokee?

Locate a body ground under the vehicle and attach one end of the 16-gauge wire to the body ground. Run the ground wire through the transmission wiring grommet, and attach it to the negative side of the TCC solenoid. Decide where the toggle switch will be located within the vehicle, and install it.

Why does my torque converter lock up when I Go overdrive?

If you’re unfamiliar with exactly what the torque converter lock up is or does, the easy answer is, the lock up clutch takes stress off the fluid coupling of the torque converter and it helps decrease the amount of heat being generated at higher cruising speeds. Converter lock up wasn’t really an issue until the overdrive came about.