This being a 3.8 the upper intake is in the way. Remove the upper intake manifold before you continue.
Follow the speedometer cable from the firewall down past the engine rearward of the engine behind the intake and down to the transaxle (transmission) near where the right hand (passenger side) axle goes in. Eventually your hand (wrapped around the speedometer cable) will be unable to continue as a heat shield gets in the way.
The heat shield is clipped on and you can just pull it off. Behind the heat shield lies the sensor. Unplug the wiring connector (2 wires) then remove one bolt to remove the sensor from the transaxle. Be careful not to kink the speedometer cable while removing the speed sensor. If you kink it your speedometer will bounce until you replace the cable with a new one.
With the sensor out of the transaxle, you can now separate it from the cable for replacement.
The speedometer is driven by the vehicle speed sensor. See "Related Questions" below for more about where to find it, and how to replace one.
On the transmission.
where is the transmission speed sensor located on a 2005 ford taurus
The Vehicle Speed Sensor on the 1996 Mercury Villager is located on the back of the transmission (as you look at the vehicle from the front) on top of the transmission with a pair of wires leading away from it... best to reach it from under the vehicle.
Cam position is taken from the distributor on this vehicle, there is no separate cam sensor.
A speed sensor on a 1998 Mercury Tracer is located on the transmission housing of the vehicle. It is placed on top in a secure location to safely measure the speed the transaxle spins.
where is a knock sensor located for a 2001 Ford Taurus se
where is the location of the vehicle speedometer sensor on a 99 Mercury Mountaineer
where is the speed sensor on 2002 mercury mountaineer
The speed sensor on a 1999 Taurus is on top of the transmission. It is located directly under the number 2 cylinder.
The 1992 Ford Taurus is not equipped with a knock sensor. The Ford Motor Company has been producing the Taurus since 1985.
The DPFE sensor is located in the center of the vehicle near the firewall. It is easiest to see and replace if you remove the plastic cover on top of the engine.