The Classic Instruments 1955–1986 Jeep CJ Direct Fit Electric Gauge Package is an all-in-one, plug-and-play instrumentation upgrade engineered specifically for CJ5, CJ6, CJ7, and CJ8 Scrambler dashboards. Featuring rugged air-core movements, double-gasket weather sealing, and integrated Zeus Speedometer Technology, this system eliminates the need for external control modules while delivering precision electronic readouts directly in the factory dash openings.
System Architecture & Engineering Highlights
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Direct-Fit Factory Cluster Geometry: Centers around a 5-5/8" multi-gauge main cluster housing a 120 MPH speedometer, water temperature, and fuel level gauges, paired with matching 2-1/8" auxiliary volt and oil pressure gauges for stock dash cutouts.
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Integrated Zeus Speedometer Technology: Eliminates external converter boxes by processing speed signals directly inside the cluster. Compatible with transmission speed sensors (VSS), GPS speed senders, or ECM outputs, and includes a built-in ECM signal filter switch to eliminate pointer bounce from electrical noise.
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Universal Fuel Gauge Ohm Calibration: Features a rear-mounted selector switch supporting multiple ohm ranges, allowing plug-and-play compatibility with original Jeep stock sending units, aftermarket fuel cells, or Classic Instruments senders without swapping senders.
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Ruggedized Trail Construction: Built with vibration-resistant air-core meter movements containing minimal moving parts, protected by a double-gasket seal against trail dust and moisture.
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Integrated Dash Indicators & Halo Lighting: Incorporates a built-in LED dimmer, Four-Wheel Drive (FWD) and Brake warning indicators, and Classic Instruments' perimeter Halo lighting (with an optional integrated low-fuel warning indicator).
Technical Specification Matrix
Kit Contents Checklist
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Primary Instrumentation: (1) 5-5/8" Direct-Fit Cluster (120 MPH Speedometer, Fuel, Water Temp)
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Auxiliary Instrumentation: (1) 2-1/8" Oil Pressure Gauge, (1) 2-1/8" Voltmeter
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Sending Units: Classic Instruments Mopar No-Fuel Sending Unit Kit (Oil Pressure & Water Temp Senders with Bushings)
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Wiring & Calibration: Single-Gauge Plug-and-Play Wiring Harness, Push-Button Speedometer Calibration Switch
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Lighting & Indicators: Integrated LED Dimmer, Built-in FWD and Brake Warning Lights
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Documentation: Complete Vehicle-Specific Installation & Programming Manual
Installation & Calibration Notes
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Fuel Sender Ohm Matching: Prior to bolting the 5-5/8" cluster into the dashboard, set the rear dip/selector switches to match your tank's fuel sender resistance range (e.g., 73–10 ohms for standard 1955–1986 Jeep CJ senders).
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Push-Button Speedometer Calibration: Mount the included calibration push-button in an accessible under-dash location. Drive a measured one-mile distance to automatically calibrate the Zeus speedometer to any tire size and axle gear ratio combination.
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ECM Signal Filtering: If driving the speedometer from an aftermarket EFI or factory ECM speed signal and experiencing erratic needle flutter, toggle the cluster's built-in ECM signal filter switch to clean the square-wave input.
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Optional Tachometer / Clock Cutouts: On 1977 and newer CJ models (including Renegade and Golden Eagle packages), factory dash stampings provide dedicated space for the optional 2-5/8" tachometer and clock; earlier dashes require hole-sawing if adding these optional gauges.
