GlowShift Speedometer Adapter Converts the Transmission Mechanical Speedometer Signal to Electronic Signal that Sends MPH Readings Electronically to GlowShift Speedometer Gauge - Compatible with GM & MOPAR Sensor Adapter Features 7/8-18 Female Thread - 9' Wire Harness with Sensor, Power & Ground Wires Compatible with Any GlowShift Speedometer Gauge Includes Step-By-Step Installation Instructions GlowShift Guarantee with One Year Limited Warranty & Free Lifetime Technical Support GlowShift’s 16 Pulse Speedometer Sensor Adapter converts your vehicle’s GM transmission from a mechanical speedometer signal to an electronic signal that sends electronic MPH readings to your GlowShift 3-3/4” In-Dash Speedometer Gauge. This sensor adapter features a 7/8-18 female thread that connects to the transmission and a 3 pin male connector that plugs into the female connector of the 9’ wire harness. The wire harness features 3 lead wires for sensor, power and ground connections. GlowShift includes installation instructions, free lifetime technical support and a one year limited warranty with each purchase.