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This kit will enable the driver to control the operation of the torque converter Lock-up. The switch will allow the driver to turn the lock-up function off during in-town driving and on during high speed/highway driving. When the switch is on the transmission will not engage in to lock-up until the transmission is in 4th gear. The transmission will automatically disengage lock-up switch when it downshifts to 3rd gear and re-engage when the transmission shifts back to 4th gear. This kit is an external wired kit, no need to drop pan for installation.
This kit is used with 700R4 automatic transmissions that do not have a 4th Gear pressure port. It is required to modify the existing working wiring harness to convert the factory lock up circuit to 4th Gear Lock Up.