2000 Hyundai tiburon wont go to fourth gear Runs great 1 2 and 3 but wont kick in to fourth I don't think its the transmission but an electrical problem Any ideas?

Check your O/D switch on the shifter, if the light doesn't come on the dash saying "OD Off" when you push the button in then its possible the wires have been pinched or cut. I have a 2000 Hyundai accent, the wires that go to the switch looked like they had been pinched, after fixing them after about a month the tranny started going into 4th.