1947-87 Chevy-GMC TruckTorque Converter Lock-Up Switch Kit, 700R4 & 200R4 Transmission

Lock-Up Switch Functionality. The Lock-Up Switch Kit for 700-R4 and 200-R4 transmissions is designed to enable proper lockup operation on these transmissions without requiring the factory transmission controller. It offers a practical solution for builds or repairs where the original computer control system is not present or preferred, ensuring efficient torque converter engagement and improved fuel economy.

Construction and Appearance. This kit includes durable components such as a pressure switch and an inline fuse. The materials and design are chosen to withstand automotive environments, providing reliable performance and long-lasting service.

Installation. Installation is straightforward for those with basic mechanical skills. While it does not normally require drilling, it is essential to verify that the transmission has the necessary 1/4" NPT threaded 4th gear pressure port to guarantee correct fitment and operation.

Application. This kit is designed specifically to fit 700-R4 and 200-4R transmissions equipped with a 1/4" NPT threaded 4th gear pressure port. Confirming the presence of this port before ordering is essential, as not all factory transmissions include it.

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