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Torque Converter Lock Up Kit

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Torque Converter Lock Up Kit Guides

Hands-Free Torque Converter Lockup Kit Automatic Activation

Worried about your vehicle's wasted power? You should invest in parts that would maximize engine efficiency and boost fuel economy. Over the long haul, this would significantly advantage your vehicle and spare you from conceivable costs. One of the ways you can enhance your engine's execution and conserve power is by utilizing a torque converter lock up kit. Used greatly to prevent power loss, this kit will absolutely help you in setting up the whole mechanism in your vehicle.

Difficulty: Moderate

Things you'll need:

  • Internal Wiring Harness
  • External Wiring Harness
  • Vacuum Switch
  • Fourth Gear Pressure Switch - 2 terminal, N.O.
  • 2 Splice Connectors
  • #4 Machine Screw
  • Electrical Tape

Step 1: Drain transmission oil pan. Remove transmission oil pan bolts. After the liquid has depleted, remove the rest of the bolts and drain out the remaining fluid

Step 2: Remove internal wiring harness. Delicately disconnect the wire connectors from the switches. Unplug the wiring harness from the connector near the detent roller spring after removing the wires from the clips. Pry connector tab away from the plug and pull the plug down. Do not pull on the wires.

Step 3: Install the switch and torque to 8-foot pounds. Additional OEM switches may be left in place even though they will not be utilized.

Step 4: Installation of Wiring Harness: Most applications will accept the OE solenoid. All the two wire solenoids are sufficient. If you have a solenoid with only one wire, it can not be used. Using your OEM, two wire solenoid, cut both wires allowing about 2-1/2" for splicing to the wiring harness. To attach your solenoid to the wiring harness, use the splice connectors provided. Connect the positive solenoid wire to the wire going to Terminal A on the wiring harness then connect the negative solenoid wire to the harness wire going to Terminal B. Install wiring harness and solenoid into the transmission. Torque the solenoid bolts to 8 foot pounds. Plug the two pressure connectors into the fourth pressure switch on the valve body. Reinsert the black plastic transmission case connector into the transmission. If you are working with a 700R4, you may want to transfer your OEM white plastic wire retainer from your factorywiring harness to the wiring harness in order to keep wires neatly in place.

Step 5: To use the #4 machine screw to maintain the switch to the case, a new 3/32" hole must be drilled in the mounting boss. If floor pan clearance is a problem then secure the ring terminal to the mounting boss on the case to give a good ground and secure the switch in the wiring harness with electrical tape so that it does not bang around. Connect the vacuum switch to a ported vacuum source on the carburetor or throttle body. The TCC is now set to engage automatically in 4th gear only. The converter clutch will release when the transmission is down shifted out of 4th gear.

Step 6: If you desire more control over the TCC you have three options:

  • Option 1 will grant you to manually lock up the torque converter in 2nd gear, 3rd gear and/or 4th gear by running the green wire (Terminal B) to a grounded dash mounted toggle switch.
  • Option 2 is for drivers that may want to shut down the TCC system through a second dash mounted toggle switch between to the red wire on the external harness (Terminal A) and the switched 12-volt source. You may manually turn the lock up system completely on and off.
  • Option 3 is for those who desire immediate release of the TCC when braking. For this, you'll need an OEM brake pedal switch with a normally closed circuit. Run you switched 12-volt source through the brake switch and then to the red wire on the external harness.

Step 7: Reinstall Transmission Pan: Install a new filter. Remove any pan gasket material that may have been left off in the transmission case during pan removal. Always replace transmission pan gasket when reinstalling pan. Refill transmission with ATF being sure not to overfill.

For a final word of advise, a damaged torque converter lockup will introduce cautioning signs before totally breaking down. When you see slippage between the gears or shivering noises in the motor, it is best to replace your Lockup Kit.

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