Can't shift into any gears on 1991 Mitsubishi 3000GT SL

I have a 1991 mitsubishi 3000gt andWhen off, the car shift to all gears fine. When turned on, I cant shift into any gears at all. It feels as if the car has it locked. Someone help please!!

Asked by for the 1991 Mitsubishi 3000GT SL
2 answers
You may have had a failure in the clutch hydraulic system- check the fluid- if it is low you have a leak!! Greg
You don't specify if automatic or manual transmission. In eather case, have you checked to make sure the transmission fluid is at the proper level