My 97 GT does the same thing. Running the shifter through the gears and letting it sit in '1' for a short time will usually get it to catch. Once it catches in '1', all the gears work. Revving doesn't seem to help. I drive in '3' until it warms up because it has a delayed downshift into 1st when I stop and will sometimes slip when starting from a stop or turning a corner slowly. Once it's warm, it's fine.