The Vehicle Speed sensor is located on the side of the transmission. You would be best to remove the battery tray and air intake plenum to see it. Trace the fuse block wire going to the back of the transmission. it will be located on the Left side (looking at the motor) after the ribs pointing back at you. It should have one mount screw and when you pull it out it will have a magnet on the end of the sensor.
To replace the VSS, disconnect the electrical connector remove retaining bolt and it should fall right out.
Simple once you see it. that's half the battle.
how much should a minivan battery cost to replace 2008 Chrysler Town and Country
Was quoted for a complete replacement at Firestone for $1300
About 1500
You don't repair, you replace.
It cost me $2600 in Healdsburg California.
Replace it.
where can I find a diragrame that shows how to replace a water pump on a 2006 Chrysler town country tour van
Yes
It depends on the make and model of the minivan.
No.
You can not, you will have to replace the entire tail light.
Replace the gauge. This problem indicates an un-repairable failure inside the unit.