The 020 numbers are the early productions TCMs. With a hose on the snout (tip) and the other end in your month blow air into the shifts solenoids ONLY while applying 12 volts and low amperage to the solenoids, with power you can blow air; no power no air. The shifts solenoids are normally closed. Do not test the other solenoids they are PWM..

Go to the dealer FIRST.