Excessive heat is the number one reason automatic transmissions fail. Prevent transmission damage by using a TCI transmission temperature gauge to monitor the temperature and detect heating problems. Transmission temperature gauges are offered in your choice of 2-5/8" or 2-1/16" diameter with a range of 140 to 280 degrees Fahrenheit to fit in or under most dashboards. Knowing the exact line pressure of your racing or street transmission is critical to ensuring proper performance and long life. TCI Transmission Pressure Gauges are complete gauge-to-sender kits that allow you to safely and effectively monitor the internal pressure of the transmission. These 2-5/8" transmission pressure gauges fit in or under most dashboards and have a 0 to 300 psi range. Best of all, these kits feature easy-to-install sensor adapters and they work with any automatic transmission. Temperature and Pressure Gauges come with all necessary installation hardware.