To be certain:
1. Consult a repair manual specific to your 2001 Town & Country. A Haynes or Chilton manual will have diagrams showing the sensor's location. This is the most reliable way to find it.
2. Check online forums: Search forums dedicated to Chrysler Town & Country vehicles (like the Chrysler Town & Country forums on sites like Club Chrysler) for discussions about VSS location. Someone may have already posted pictures or detailed instructions.
Without knowing your specific transmission type, I cannot give a precise location. But generally, look near the top or side of the transmission case, often near a wiring harness. It's a relatively small sensor with a single electrical connector. Be aware that you'll likely need to get under the vehicle to see it properly.