The JET TH-700-R4 4th Gear Lockup Kit allows use of the lockup torque converter feature in non-computer applications. The kit will properly operate the converter lock up clutch in conversions using the TH-700-R4 transmission. The kit features a vacuum switch to unlock the converter clutch under high engine load to increase torque multiplication. Available for all TH-700-R4 transmissions. Installs without having to remove transmission pan.
