Ohhhh. That's not a kick down cable. You're describing the cruise control servo and its throttle cable. The servo has four wires in its connector and a vacuum hose that attaches to the check valve on the power brake booster. None of that stuff affects how the transmission shifts.
When the Electronic Automatic Transmission Controller, (EATX), detects a sensor problem or slippage in one of the clutch packs, it defaults to "limp-in" mode which is second gear. You will have a choice of park, reverse, neutral, and second gear when any forward gear is selected. To get it out of limp-in, you have to turn the ignition switch off and restart the engine. Once it has gone into limp-in, there will be at least one diagnostic fault code stored in the computer. It should also cause a code to be set in the Engine Computer which will turn on the Check Engine light.
The place to start is by having the code(s) read. Many auto parts stores can do this for free with the Engine Computer. I don't know if they can read codes from the Transmission Computer. You might have to find a mechanic with a scanner that can access the other computers on the van.
It's important to not disconnect the battery or let it run down until the codes have been read. Doing so will erase the stored codes and you will lose that valuable information. Codes are especially useful when you have intermittent problems.
Tuesday, September 14th, 2010 AT 9:04 PM