I own a 2006 Ram 2500 4x4 and recently had the transmission rebuilt by a local shop. They installed a Transgo shift kit and a billet torque converter, but to my knowledge, those are the only parts that are not stock. The problem is that now the transmission always starts off in 2nd gear and wont drop down into 1st. The only way the transmission will go into f1st is if it is manually selected on the shift lever. Any ideas would be greatly appreciated.