{"product_id":"gm-transmission-to-electronic-speedometer-converter","title":"ESA-01 GM Transmission to Electronic Speedometer Converter","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eUpgrade your classic GM transmission to work with modern electronic speedometers using the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eESA-01 Transmission to Electronic Speedometer Converter\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe ESA-01 replaces the factory mechanical speedometer cable drive and generates a reliable electronic speed signal suitable for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSAAS electronic speedometers\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and many other aftermarket gauge systems that accept a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e12V square wave input\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003ePerfect for Holden restorations, street machines, hot rods, custom builds, and electronic dash conversions, the ESA-01 provides a simple and reliable solution for converting older GM transmissions to electronic speedometer operation without modifying the transmission.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003e✅ Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Converts mechanical speedometer cable output to an electronic speed signal\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Compatible with SAAS electronic speedometers\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Suitable for many aftermarket speedometers accepting a 12V square wave input\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ No transmission modifications required\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Direct bolt-in installation\u003cbr\u003e\u003cbr\u003e✅ Full installation instructions included\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Speedometer calibration compensates for diff ratio, gearbox gearing and tyre size\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ CNC-machined aluminium housing\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Waterproof connector with locking clip\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Includes 2.7m double-insulated wiring loom\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Ideal for Holden Commodore, muscle car and custom dash conversions\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003e🔌 How It Works\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe ESA-01 installs directly into the factory speedometer cable output on compatible GM transmissions and generates a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e12V square wave signal (16 pulses per revolution)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e for your electronic speedometer.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eSimply connect:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Ignition-switched 12V power\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Ground\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Speed signal wire\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eYour electronic speedometer can then be calibrated to accurately display vehicle speed regardless of differential ratio, gearbox ratio or wheel size.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cem\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0561\/6232\/0458\/files\/Connection_Schematic.png?v=1781076571\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003e🔧 Transmission Compatibility\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003eStandard ESA-01 Option\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eSuitable for GM transmissions with a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e7\/8\"-18 speedometer cable connection\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, including:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Powerglide\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ TH350\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ TH400\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Other GM transmissions using a 7\/8\"-18 speedometer cable output\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cem\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0561\/6232\/0458\/files\/2026-04-26_12.40.27.jpg?v=1781076628\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003e🔧 ESA-02 Adapter Option (+$140)\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eSome transmissions do not have the correct speedometer cable connection required for the ESA-01 to install directly.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor these applications, the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eESA-02 Cable Adapter\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is required and allows the ESA-01 converter to be used with:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Holden Trimatic\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ M20 4-Speed Manual\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ M21 4-Speed Manual\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe ESA-02 adapter connects between the transmission and the ESA-01 converter, providing the correct interface for these transmissions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cem\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0561\/6232\/0458\/files\/Trimatic_Converter_Cable_1.jpg?v=1781076652\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003e⭐ Premium Construction\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBuilt for long-term reliability in automotive environments:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Aluminium CNC-machined body\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Corrosion-resistant finish\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Waterproof electrical connection\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Secure locking connector\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Quality wiring loom included\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003e📋 Specifications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Mounting Thread: 7\/8\"-18 Female\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Connector Type: 3-Pin Waterproof Connector\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Output Signal: 12V Square Wave\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Pulse Rate: 16 Pulses Per Revolution\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Power Requirement: Fused 12V Ignition Supply\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Housing Material: Aluminium\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Cable Length: 2.7 Metres\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ Wiring: 3-Core Double Insulated Cable\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003e📦 Available Options\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003eOption 1\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ ESA-01 Converter Only\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eSuitable for Powerglide, TH350, TH400 and other GM transmissions with a 7\/8\"-18 speedometer cable output.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eOption 2\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e✅ ESA-01 Converter + ESA-02 Adapter (+$140)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eRequired for Holden Trimatic, M20 and M21 transmissions.\u003c\/span\u003e\u003c\/p\u003e","brand":"EMDAWG JDM","offers":[{"title":"No","offer_id":43689130262602,"sku":"ESA02","price":179.0,"currency_code":"NZD","in_stock":true},{"title":"Yes ($140)","offer_id":43689150185546,"sku":null,"price":351.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0561\/6232\/0458\/files\/2026-04-2612.40.27.jpg?v=1781074566","url":"https:\/\/emdawgjdm.com\/en-nz\/products\/gm-transmission-to-electronic-speedometer-converter","provider":"EMDAWG JDM","version":"1.0","type":"link"}