Hi guys so I'm new here. I have a question regarding my 93 runner. So the other day I get in it and put it in drive and it will not go anywhere. I started trying to figure out what was going on so I put it in 4hi and it still did not move. But when I put it in 4lo it will go anywhere you want it to go with absolutely no slipping. I can climb hills and climb on top of big rocks with absolutely no problem. Does anyone have a clue as to what could be causing this. I changed the fluid and added Lucas transmission additive which did not help a bit. Thanks in advance guys.