The 700R4 transmission from General Motors ... The 4L60 remained a hydraulically shifted transmission relying only on governor pressure and position of the throttle valve (TV) cable to complete ...

Just like the 700R4, the 4L60 was still a transmission that was hydraulically shifted, needing only the TV cable position and governor pressure to make its shifts. In 1993, the 4L60 evolved into ...

By changing some parts in the valvebody, your transmission—in this case a 700-R4—can be “reprogrammed” to have firmer, power-saving shifts. With the TCI Automotive Constant Pressure Valve ...