I have just got a 78 series landcruiser. I am not able to put the gear stick into L4 or N. I have no problem putting the car into H4 from H2 and back. I have tried depressing the clutch and lifting will pulling down but it wont move into L4 or N. I have read the owners manual and followed all the instructions. I dont know what i am doing wrong. Any help would be appreciated