The purpose of the TCC control (torque converter clutch) wiring is to disable the torque converter clutch whenever you apply your brakes.

We offer two different types of torque converter control wiring systems. The first one uses a GM Cruise Control Switch for use in General Motors vehicle that uses the plunger style brake light switch common to all cars and many pick ups manufactured from 1955 until the early eighties. By clicking on the above link you will see a picture of the Cruise control switch we supply in our kit. Under your dash, your switch may look like this but only have the two terminals for your brakes light circuit. Our new four terminal switch will replace your present two terminal switch and will simply mount right into your stock brake switch holder. If you are certain you have this type brake light switch, it is a very quick easy way to do the converter control system. After mounting the new four terminal brake light switch, and finding a keyed on hot power source, the rest of the system just plugs in.

If you don't have the General Motors plunger type brake light switch described above, you will need to use our Bosch Relay style torque converter system. Other types of brake light switches can be in line pressure activated switches or any of many other types of mechanically activated switches that are activated by your vehicles brake pedal linkage. If in doubt, purchase the Bosch Relay system because it will work for all vehicles regardless of brake light switch type.

The end result will be the same. Both of these control methods simple break the torque converter control power feed circuit whenever you apply the brakes. This is designed to prevent stalling the engine should you skid the rear tires even for just an instant. While engaged the torque converter clutch is effectively the same as a manual car clutch. Skidding the rear tires in a panic stop situation would kill the engine if you didn't have this safety circuit. This would be the same as not pushing in the clutch on a manual transmission equipped car and skidding the rear tires only worse. The manual transmission cars engine would restart once you let off the brakes and the rear tires started to turn again. Not so with an automatic transmission, once the engine died, the transmission would drop out of gear and you could find yourself traveling down the highway at 60-70 mph with the engine dead! Not a good program if you have power steering and power brakes.