Hopefully it's just low on fluid still. You have to check it in neutral and running to get an accurate reading. So let it warm up, apply the park brake and shift into neutral and check it.
97 Sahara, 74 Renegade, 72 CJ5, 55 Willy's (the Beast) Boss 302, 6:34 gearing, Bose 901 speakers.
God I miss that Jeep. Forgot the kinda Jeep, 80 SX4.