2-5/8in. TRANSMISSION TEMPERATURE; 140-280 ° F; SPORT-COMPTransmission fluid temperature is the single biggest contributing factor to the lifespan of your automatic transmission. Having an accurate, realtime measurement allows you to know when to downshift or when to take your foot out of it. Whether you're towing or simply trying to harness the power of a built or boosted motor, AutoMeter's Mechanical Trans Temp Gauge will give you the most accurate possible measurement for the exact temp of your trans fluid. An 8' Capillary Tube with a 1/2 NPT mounting nut is included to be installed in your transmission pan. An optional trans cooler line manifold is available for another easy installation option. Incandescent Lighting Illuminates Around Perimeter Of Dial Mechanical Movement Provides Accuracy And Durability No Electrical System Required For Gauge Operation Incl. 1/2 in. NPT Adapter Incl. Bulb/Socket Assembly/Red And Green Bulb Covers Incl. Mounting Hardware/Detailed Instructions