Recently my 98' Mustang GT has starting to have what I believe is transmission issues it's an automatic. When I put it into drive there is no idle speed, I have to raise my RPM's to a non specific height from 1000-4000 just to get the vehicle. It runs fine after it is worked into gear, but if I floor the peddle the RPM's will free idle until I release the gas then it gives a hard shift into the next gear. I think I may have an internal crack, but I'm not sure.