Hi dannymckneely. Welcome to the forum. Some punctuation would clear up the description, but it sounds like it's going into "limp-in" mode. That's the default condition where it stays in second gear to allow you to drive slowly to a repair shop. You must turn the ignition switch off and back on to reset the transmission computer.
This isn't definite, but as a general rule, if it defaults to limp-in as soon as you shift to reverse or drive, it is a sensor-related problem. If the default occurs immediately after a shift to a new gear, it is due to slippage in one of the clutch packs. As normal clutch plate wear takes place, older transmissions would develop sloppy or mushy shifts that developed so gradually it was barely noticed. With your transmission, the computer knows how much fluid it takes to apply each clutch, and will update that information over the life of the transmission to continue to deliver crisp, solid shifts, but eventually the day comes when it can't update enough to overcome the slippage between shifts. When the computer sees that slippage, it goes to limp-in.
The fault codes you listed are stored in the Engine Computer. Aftermarket, inexpensive code readers only read codes in that computer. Code P0700 just means there is at least one diagnostic fault code stored in the transmission computer, (Electronic Automatic Transmission Controller - EATX). You will need a hand-held computer called a scanner to read the codes in the EATX. Scanners also read sensor data and can activate other circuits and systems.
caradiodoc
May 16, 2010 at 7:36 PM
