My tranmission has recently been rebuilt recently and now the overdrive gear keeps on switching on me back and forth quite a bit between 45 and 65 mph. I know that it will kick down under load, but it kicks down frequently at a steady speed and only for like 3 seconds before it goes back into over-drive again...... Could this be a sensor problem or somthing wrong with the computer? Thanks p.s. my car is a '94GT