I have a 2000 Durango with a 4.7/45rfe, 4x4, 115,000mi., and am having some intermittent problems. About a year ago it started to act like the converter was staying locked up during deceleration. Usually it would just pull the engine RPM down and then it would "release" and it would idle fine. Upon further examination, i noticed that it would only do this a few times when the truck had first been started and after it warmed up, it acted completly normal. I talked to 4 or 5 different transmission shops and on their recommendations changed out all of the electronic components in the transmission. I have replaced the input speed sensor, output speed sensor, line pressure sensor and swapped the entire solenoid pack for a new style(white plug) version. After all of that, the transmission still acted the same. Once spring hit, the severity of the problem decreased and after throwing a bunch of money at it, I decided to live with it for the summer. Now that the temperature has dropped again, the problem has come back with a vengance and has brought some other problems with it. Now, on a cold morning, when i start my truck and put it in gear, it engages into 3rd gear and goes into limp mode. If i put it back in park and cycle the key a few times, it will work like normal (still has the downshift problem). I am at a loss and don't have the downtime available to pull the tranny. Does anyone know what could possibly be causing all of these problems?