{"product_id":"1955-86-jeep-cj-optional-2-5-8-tachometer-classic-instruments","title":"1955-86 Jeep CJ Optional 2-5\/8\" Tachometer - Classic Instruments","description":"\u003cp dir=\"ltr\" data-path-to-node=\"0\" class=\"first-token\"\u003e\u003cspan class=\"\"\u003eThe \u003c\/span\u003e\u003cb data-path-to-node=\"0\" data-index-in-node=\"4\" class=\"\"\u003eClassic Instruments 1955–1986 Jeep CJ Optional 2-5\/8\" Tachometer\u003c\/b\u003e\u003cspan class=\"\"\u003e is a matching auxiliary instrumentation upgrade engineered specifically to complement Classic Instruments’ 1955–1986 Jeep CJ Direct Fit Electric Gauge Package.\u003c\/span\u003e\u003cspan\u003e Designed to drop directly into the factory tachometer dash cutout found on 1977 and newer CJ5,\u003c\/span\u003e\u003cspan\u003e CJ7,\u003c\/span\u003e\u003cspan\u003e and CJ8 models (such as Renegade and Golden Eagle packages)—or custom-mounted in earlier 1955–1976 dashes—this 2-5\/8\" gauge combines vintage-matched styling with modern calibration,\u003c\/span\u003e\u003cspan\u003e integrated shift alerting,\u003c\/span\u003e\u003cspan\u003e and EFI data-logging capability.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\" data-path-to-node=\"2\"\u003eSystem Architecture \u0026amp; Engineering Highlights\u003c\/h3\u003e\n\u003cul dir=\"ltr\" data-path-to-node=\"3\"\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"3,0,0\"\u003e\u003cb data-path-to-node=\"3,0,0\" data-index-in-node=\"0\"\u003eMatched Aesthetic Integration:\u003c\/b\u003e\u003cspan\u003e Styled identically to the main 5-5\/8\" Jeep CJ cluster,\u003c\/span\u003e\u003cspan\u003e ensuring uniform bezel profiles,\u003c\/span\u003e\u003cspan\u003e pointer styling,\u003c\/span\u003e\u003cspan\u003e and dial typography across the dashboard.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"3,1,0\"\u003e\u003cb data-path-to-node=\"3,1,0\" data-index-in-node=\"0\"\u003ePush-Button Cylinder Calibration:\u003c\/b\u003e\u003cspan\u003e Eliminates manual dip-switch guesswork by allowing straightforward push-button programming for \u003c\/span\u003e\u003cb data-path-to-node=\"3,1,0\" data-index-in-node=\"129\"\u003e4-, 6-, and 8-cylinder\u003c\/b\u003e\u003cspan\u003e engine signals,\u003c\/span\u003e\u003cspan\u003e accommodating anything from original AMC\/Jeep four- and six-cylinder engines to V8 swaps.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"3,2,0\"\u003e\u003cb data-path-to-node=\"3,2,0\" data-index-in-node=\"0\"\u003eFull-Dial Red Shift Light Alert:\u003c\/b\u003e\u003cspan\u003e Features an integrated red shift indicator that illuminates the entire gauge face red upon reaching a user-programmed RPM threshold,\u003c\/span\u003e\u003cspan\u003e providing unmistakable peripheral visibility without mounting a bulky external pod.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"3,3,0\"\u003e\u003cb data-path-to-node=\"3,3,0\" data-index-in-node=\"0\"\u003eExternal Warning Light \u0026amp; Data-Logging Outputs:\u003c\/b\u003e\u003cspan\u003e Equipped with an auxiliary trigger output to drive external dash warning lamps alongside a dedicated \u003c\/span\u003e\u003cb data-path-to-node=\"3,3,0\" data-index-in-node=\"148\"\u003e0.5–4.5 VDC analog output\u003c\/b\u003e\u003cspan\u003e for feeding real-time RPM signals into standalone EFI systems or data loggers.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"3,4,0\"\u003e\u003cb data-path-to-node=\"3,4,0\" data-index-in-node=\"0\"\u003eSelectable LED Illumination:\u003c\/b\u003e\u003cspan\u003e Built-in LED perimeter\/backlighting allows the builder to choose between \u003c\/span\u003e\u003cb data-path-to-node=\"3,4,0\" data-index-in-node=\"102\"\u003eWarm White\u003c\/b\u003e\u003cspan\u003e (for an incandescent vintage glow) or \u003c\/span\u003e\u003cb data-path-to-node=\"3,4,0\" data-index-in-node=\"151\"\u003eCool White\u003c\/b\u003e\u003cspan\u003e (for crisp,\u003c\/span\u003e\u003cspan\u003e modern contrast).\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\" data-path-to-node=\"5\"\u003eTechnical Specification Matrix\u003c\/h3\u003e\n\u003ctable data-path-to-node=\"6\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature \/ Metric\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eTechnical Specification Detail\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"6,1,0,0\"\u003e\u003cb data-path-to-node=\"6,1,0,0\" data-index-in-node=\"0\"\u003eManufacturer\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"6,1,1,0\"\u003eClassic Instruments\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"6,2,0,0\"\u003e\u003cb data-path-to-node=\"6,2,0,0\" data-index-in-node=\"0\"\u003eSystem Style\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"6,2,1,0\"\u003eOptional Matching Auxiliary Electric Tachometer\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"6,3,0,0\"\u003e\u003cb data-path-to-node=\"6,3,0,0\" data-index-in-node=\"0\"\u003eVehicle Application\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"6,3,1,0\"\u003e1955–1986 Jeep CJ Series (CJ5, CJ6, CJ7, CJ8 Scrambler)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"6,4,0,0\"\u003e\u003cb data-path-to-node=\"6,4,0,0\" data-index-in-node=\"0\"\u003eGauge Diameter\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"6,4,1,0\"\u003e2-5\/8\" Round\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"6,5,0,0\"\u003e\u003cb data-path-to-node=\"6,5,0,0\" data-index-in-node=\"0\"\u003eEngine Compatibility\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"6,5,1,0\"\u003eCompatible with 4-, 6-, and 8-Cylinder Tachometer Signals\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"6,6,0,0\"\u003e\u003cb data-path-to-node=\"6,6,0,0\" data-index-in-node=\"0\"\u003eCalibration Method\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"6,6,1,0\"\u003ePush-Button Digital Calibration\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"6,7,0,0\"\u003e\u003cb data-path-to-node=\"6,7,0,0\" data-index-in-node=\"0\"\u003eShift Alert Feature\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"6,7,1,0\"\u003eIntegrated Full-Face Red Shift Light Illumination\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"6,8,0,0\"\u003e\u003cb data-path-to-node=\"6,8,0,0\" data-index-in-node=\"0\"\u003eAuxiliary Outputs\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"6,8,1,0\"\u003eWarning Light Trigger Output \u0026amp; 0.5–4.5 VDC Analog Data-Logging Output\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"6,9,0,0\"\u003e\u003cb data-path-to-node=\"6,9,0,0\" data-index-in-node=\"0\"\u003eIllumination Options\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"6,9,1,0\"\u003eSelectable LED Lighting (\u003cb data-path-to-node=\"6,9,1,0\" data-index-in-node=\"25\"\u003eWarm White\u003c\/b\u003e OR \u003cb data-path-to-node=\"6,9,1,0\" data-index-in-node=\"39\"\u003eCool White\u003c\/b\u003e)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"6,10,0,0\"\u003e\u003cb data-path-to-node=\"6,10,0,0\" data-index-in-node=\"0\"\u003eCountry of Origin\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"6,10,1,0\"\u003eMade in USA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 dir=\"ltr\" data-path-to-node=\"8\"\u003eKit Contents Checklist\u003c\/h3\u003e\n\u003cul dir=\"ltr\" data-path-to-node=\"9\"\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"9,0,0\"\u003e\u003cb data-path-to-node=\"9,0,0\" data-index-in-node=\"0\"\u003ePrimary Gauge:\u003c\/b\u003e\u003cspan\u003e (1) 2-5\/8\" Jeep CJ Style Electric Tachometer\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"9,1,0\"\u003e\u003cb data-path-to-node=\"9,1,0\" data-index-in-node=\"0\"\u003eMounting Hardware:\u003c\/b\u003e\u003cspan\u003e Retaining U-Bracket \/ Spin-Lock Ring and Fasteners\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"9,2,0\"\u003e\u003cb data-path-to-node=\"9,2,0\" data-index-in-node=\"0\"\u003eWiring \u0026amp; Calibration:\u003c\/b\u003e\u003cspan\u003e Gauge Pigtail Harness,\u003c\/span\u003e\u003cspan\u003e Push-Button Calibration Switch\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"9,3,0\"\u003e\u003cb data-path-to-node=\"9,3,0\" data-index-in-node=\"0\"\u003eDocumentation:\u003c\/b\u003e\u003cspan\u003e Installation,\u003c\/span\u003e\u003cspan\u003e Wiring,\u003c\/span\u003e\u003cspan\u003e and Shift-Point Programming Guide\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\" data-path-to-node=\"11\"\u003eInstallation \u0026amp; Calibration Notes\u003c\/h3\u003e\n\u003cul dir=\"ltr\" data-path-to-node=\"12\"\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"12,0,0\"\u003e\u003cb data-path-to-node=\"12,0,0\" data-index-in-node=\"0\"\u003eDashboard Cutout Fitment:\u003c\/b\u003e\u003cspan\u003e On 1977–1986 Jeep CJ dashboards equipped with factory tachometer provisions (standard on Renegade and Golden Eagle trims),\u003c\/span\u003e\u003cspan\u003e the 2-5\/8\" housing mounts directly into the existing opening.\u003c\/span\u003e\u003cspan\u003e Earlier 1955–1976 dashboards lack a factory tach cutout and require drilling a 2-5\/8\" hole using a hole saw.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"12,1,0\"\u003e\u003cb data-path-to-node=\"12,1,0\" data-index-in-node=\"0\"\u003eTachometer Signal Sourcing:\u003c\/b\u003e\u003cspan\u003e Connects cleanly to the negative (-) terminal of standard ignition coils,\u003c\/span\u003e\u003cspan\u003e dedicated tachometer output terminals on HEI\/CDI ignition boxes (such as MSD),\u003c\/span\u003e\u003cspan\u003e or square-wave tachometer outputs from aftermarket EFI ECUs.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"12,2,0\"\u003e\u003cb data-path-to-node=\"12,2,0\" data-index-in-node=\"0\"\u003eShift-Point \u0026amp; LED Programming:\u003c\/b\u003e\u003cspan\u003e Use the included push-button switch during initial setup to configure cylinder count,\u003c\/span\u003e\u003cspan\u003e set the desired shift-light RPM activation point,\u003c\/span\u003e\u003cspan\u003e and toggle between Warm White and Cool White LED backlighting.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"12,3,0\"\u003e\u003cb data-path-to-node=\"12,3,0\" data-index-in-node=\"0\"\u003eData-Logger Wiring:\u003c\/b\u003e\u003cspan\u003e If utilizing the \u003c\/span\u003e\u003cb data-path-to-node=\"12,3,0\" data-index-in-node=\"37\"\u003e0.5–4.5 VDC analog output\u003c\/b\u003e\u003cspan\u003e,\u003c\/span\u003e\u003cspan\u003e route the dedicated signal wire to an available 0–5V analog input channel on your data acquisition module or ECU and configure the scaling curve per the manual.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Classic Instruments","offers":[{"title":"OE Black","offer_id":68070663585924,"sku":"CLA JP55383OESLF","price":285.0,"currency_code":"USD","in_stock":true},{"title":"Nostalgia White","offer_id":68070663618692,"sku":"CLA JP55383NTSLF","price":285.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0286\/1180\/5316\/files\/0026643_2-58-tachometer-oe-black_300.png?v=1794521856","url":"https:\/\/hotrodhardware.com\/products\/1955-86-jeep-cj-optional-2-5-8-tachometer-classic-instruments","provider":"Hot Rod Hardware","version":"1.0","type":"link"}