Transmission 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.Features: Traditional incandescent lighting illuminates around the perimeter of the dial AutoMeter’s race proven mechanical instruments provide trusted accuracy while being simple to install No electrical system required for gauge operation - compatible with every street or race vehicle Mechanical movements provide accuracy and durability even in the harshest environments Gauge kit includes 1/2" NPT adapter, bulb and socket assembly, red and green bulb covers, mounting hardware, and detailed instructions for installation Product Description: 2-1/16" Transmission Temperature Gauge, 140-280°F, Ultra-LitePit Stop USA offers Auto Meter Mini Ultra-Lite Transmission Temperature Gauge - 2-1/16" - 140°-280° 4351 at low everyday prices. Be sure to check out all our products from Auto Meter including Auto Meter Mechanical Transmission Temp Gauges and Auto Meter Transmission Temp Gauges.