I hade it rebuild back in March of this year, and not (8/26) it only shifts and very high RPM's. I suspect its due to a vacuum line but I cant find it,. . . Or maybe the torque converter?

I have my 1999 Ford Explorer Sport and it only seems to work when I put it in reverse once I put it in drive or 3rd gear 2nd gear or first gear it does not want to move but the engine revs just perfectly and I think I hear a faint clicking sound everytime I start revving the engine please help me anyone have any ideas what's wrong with my truck