Pulse Gen.Sender 7/8-18

The VDO Pulse Gen.Sender 7/8-18 is a Hall Effect speedometer sending unit engineered to convert mechanical transmission signals into precise electronic outputs for modern engine management and cluster integration. Built for mechanics and restoration enthusiasts upgrading classic GM and Chrysler transmissions to electronic speedometer systems, this compact sender eliminates the need for mechanical cable-driven gauges while maintaining factory-level accuracy. Whether you're retrofitting a vintage drivetrain with modern instrumentation or troubleshooting speedometer issues in older muscle cars and trucks, this Hall Effect unit delivers the reliable pulse signal your ECU and digital gauge cluster demand.

The sending unit operates on Hall Effect sensor technology, generating 16 pulses per transmission revolution—a standard frequency that allows your engine computer to accurately calculate vehicle speed without lag or calibration headaches. The 7/8-18 inch threaded design threads directly into factory transmission housings on most GM and Chrysler applications, eliminating adapter complexity during installation. At just 0.7 pounds and measuring 5 x 5 x 6.4 inches, the compact profile fits tight engine bays without requiring custom brackets or modifications. Hall Effect sensors are inherently reliable, immune to electromagnetic noise, and require no moving contacts—delivering consistent signal integrity even in high-vibration environments typical of performance and off-road vehicles.

This sender is ideal for hot rodders converting cable-driven speedometers to electronic clusters, engine swap projects, and transmission rebuilds where original mechanical senders are no longer available or practical. Technicians upgrading older fuel-injected platforms benefit from its plug-and-play signal output that integrates seamlessly with GM and Chrysler ECMs and aftermarket engine controllers. Installation requires basic transmission knowledge and a 7/8-18 inch tap; ensure your transmission housing has the correct threaded bung or install a bung kit beforehand. The Hall Effect output works with most analog and digital speedometer electronics, making it a versatile solution for street cars, restorations, and classic truck builds requiring modern gauge accuracy.