700R4 Universal Converter Lock-Up Wiring Kit & Pan Gasket for GM 700R4 T700 turbo 700, Vaccum & Micro switch System

This TCI Turbo 700 Universal Lock-Up Kit for GM 700R4 works by referencing engine vacuum to automatically engage or disengage the torque converter lock-up clutch. Vacuum reference can be overridden to engage or disengage lock-up.

TCI 376600 Torque Converter Lock-Up Wiring Kit – 700R4 

The TCI 376600 torque converter lock-up wiring kit provides a simple and reliable way to control the torque converter clutch (TCC) in GM 700R4 and 2004R automatic transmissions when running a carbureted engine or a vehicle without a factory ECU.

This kit is ideal for street rods, muscle cars, engine swaps and retrofit transmission installations where the original computer control is no longer present.

The system automatically engages the converter lock-up in 4th gear during cruising, helping reduce engine RPM, improve fuel economy and lower transmission heat. When engine load increases or the transmission downshifts, the converter clutch releases automatically for smooth operation.

A manual override switch option is also included, allowing the driver to control lock-up when required.

For anyone installing a 700R4 or 2004R transmission into an older vehicle, this kit provides a clean and dependable solution for proper torque converter operation.

TCI 376600 Lock-Up Kit Features

• Designed for GM 700R4 and 2004R transmissions

• Ideal for engine swaps, street rods and muscle car conversions

• Automatically engages converter lock-up in 4th gear

• Helps reduce cruising RPM and transmission temperature

• Improves fuel economy and highway drivability

• Includes manual override capability

• Simple installation with clear instructions

Why Use a 700R4 Lock-Up Kit?

Without a proper torque converter lock-up control system, a 700R4 or 2004R transmission can run hotter and lose efficiency at highway speeds.

The TCI 376600 lock-up kit ensures the converter clutch operates correctly, helping protect the transmission while improving drivability and cruising performance.