Some 2009-2011 Ford Taurus, Edge and Flex, and 2009-2011 Lincoln MKS, MKT and MKX vehicles built from 3-13-2009 to 6-30-2010 and equipped with the 6F50 or 6F55 transmission may intermittently exhibit slipping/neutral out, 5th gear start from stop, electronic PRNDL error, backup camera-on in Drive or speed control dropping out. This may be caused by high resistance in the transmission range (TR) sensor.
SERVICE PROCEDURE
- With the brakes applied, engine off and key on, move the shifter into the low gear (L or M) position.
- Turn the ignition key to the off position.
- Disconnect connector C168 from the transmission.
- measure the resistance between the transmission connector pins:
- 8 and 4
- 8 and 5
- 8 and 6
- 8 and 7
a. The top row of the transmission’s pins are numbered 1-10 from left to right.
b. If any of the four measurements are above 5 Ohms, proceed to Step 5.
c. If all measurements are within specification, this procedure does not apply. Continue with normal diagnostics.
5, Replace the TR sensor. Refer to the workshop manual Section 307-01. The last three steps listed in this section are very important in order to prevent damage or unnecessary work.
a. The workshop manual states to remove the retaining pin that holds the TR sensor in the transmission case. A small 6-inch rolling head pry bar is effective in removing the pin.
b. The workshop manual goes into detail on making sure that the park pawl actuator rod does not become disengaged from the park pawl and the abutment by keeping the end of the park pawl actuator rod behind the machined valve body mating surface of the transaxle case, while removing the park pawl actuator rod from the TR sensor and reinstalling it back into the TR sensor. If the park pawl actuator rod becomes disengaged from the park pawl and abutment, transaxle removal and disassembly is required to reinstall the actuator rod.
