This is the Speedometer Sending Unit Upgrade to the GM Classic Dash Panel's with Guages Items. This item must be purchased with a Dash and Gauge Package! This is an Upgrade ONLY!
GM Mechanical Transmision to electric speed sensor for use with all Auto Meter electronic speedometers.
7/8" - 18THD, Hall Effect sender, 16 pulse per rev. Includes pass-thru drive for cruise control. Adapts most GM transmissions with speedometer cable output to work with Auto Meter Electric Speedometers.