Speedometer-Tachometer Drive Adapter

A Speedometer-Tachometer Drive Adapter is a device used in automotive applications to convert the rotational speed of the vehicle's transmission or drivetrain into electrical signals that can be interpreted by the speedometer and tachometer gauges on the dashboard.

In vehicles with a mechanical speedometer and tachometer, the drive adapter is typically installed on the transmission or transfer case output shaft. It consists of a gear mechanism that rotates with the shaft and a magnetic pickup or sensor that detects the rotation and generates electrical pulses.

These electrical pulses are then sent to the speedometer and tachometer gauges, which convert them into the corresponding speed and engine RPM readings displayed on the dashboard.

Speedometer-tachometer drive adapters are commonly used in older vehicles or vehicles with aftermarket gauges, where the original mechanical drive system may not be compatible or available. They provide a convenient and accurate way to monitor the vehicle's speed and engine RPM.

It's important to note that the specific design and installation requirements of a speedometer-tachometer drive adapter can vary depending on the vehicle make and model. It's recommended to consult the vehicle's service manual or seek professional assistance for proper installation and compatibility.