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Home › Geo › 1990 › Tracker Base, Automatic › Repair and Diagnosis (Single Page) › Transmission › Automatic Trans › Overhaul - 180C/3L30 › Testing › Control Pressure Test Results › Control Pressure Too High

Control Pressure Too High

Modulator vacuum line leaking or interrupted.
Failed vacuum modulator.
Vacuum leak in engine or accessory vacuum system.
Pressure regulator valve malfunction.