2001 Ford Expedition

Transmission problem
2001 Ford Expedition V8 Four Wheel Drive Automatic 116000 miles

i just recently had my transmission replaced and and everything ran good except the speedometer. While in park it will read 20mph and when I drive it will jump to 100mph and govern out what and where could be the problem? I also took it to autozone and they scanned the computer and no codes came back.
April 26, 2010.

If I had to guess, I would say they pinched the wiring going to the Vehicle Speed Sensor (VSS) or the sensor is bad. I would take it back and have them check the wiring to it and the sensor itself.

Let me know if you have other questions.