Automatic Transmission and Engine Oil Pressure TesterATD 5550 Automatic Transmission and Engine Oil Pressure Tester Checks oil pressure in automatic transmissions and gasoline engines Tests major model domestic and foreign cars and light trucks More accurate than dashboard oil pressure gauges 6 ft. of nitrile (oil proof) hose to make testing easier Standard and metric fittings 2 1 2"" gauge has a dual scale dial with ranges from 0 300 psi and 0 21 BAR