OP
First, have you disconnected your battery yet? Do that before your next start up. If the hard shift is gone, it's the PCM. The hard shift will come back, but rebooting will stop it short term. I have had the Wrangler Fix PCM in for a couple months now and I have no shift problems any more. I agree, check your fluid, but if the reboot gets rid of the hard shift, you will need the PCM replaced. I recommend the wrangler fix, it works.