Autometer Hall Effect Speedometer Sender Mechanical to Electric GM/Chrysler 7/8in-18 Thread 16 PulseThis high quality mechanical to electric hall effect speed sensor from AutoMeter is engineered to adapt to GM and Chrysler transmissions originally designed to accept a 7 8" x 18 thread on style speedometer cable. This sensor provides 16 pulse per revolution, 12 V square wave signal output, and includes a pass through connection point to support other vehicle accessories such as cruise control functions which may still require a mechanical connection