Transmission Speed Sensor: Service and Repair

Turbine Shaft Speed (TSS) Sensor and Output Shaft Speed (OSS) Sensor

REMOVAL

All vehicles

NOTE: The 4X2 application and the 4X4 application are similar.

1. With the vehicle in NEUTRAL, position on a hoist.

Excursion


2. Disconnect the wire loom from the crossmember.







3. Remove the transmission insulator-to-crossmember support nuts.







4. Attach a suitable high-lift transmission jack to the transmission.

5. Remove the crossmember bolts and the crossmember.







F-Super Duty

6. Remove the RH crossmember nuts.






7. Remove the LH crossmember nuts.







8. Remove the nuts and the crossmember.







All vehicles

9. Lower the rear of the transmission to gain access to the sensors.

10. Disconnect the electrical connector of the affected sensor.







CAUTION: Use care not to induce contamination in the form of dirt or foreign material when removing either of the sensors.

11. If necessary, remove the turbine shaft speed (TSS) sensor.
1 Remove the bolt.
2 Remove the TSS.







12. Position the heated oxygen sensor (HO2S) connector aside.







13. If necessary, remove the output shaft speed (OSS) sensor.
1 Remove the bolt.
2 Remove the OSS.






INSTALLATION

All vehicles


CAUTION: Use care not to induce contamination in the form of dirt or foreign material when installing either of the sensors.

1. If removed, install the OSS.
1 Lubricate the O-ring and install the OSS.
2 Install the bolt.






2. Position the heated oxygen sensor (HO2S) connector back in place.







3. If removed, install the TSS.
1 Lubricate the O-ring and install the TSS.
2 Install the bolt.






4. Connect the electrical connector to the affected sensor.






5. Install the crossmember to the transmission mount, using one nut to hold the crossmember in place. Raise the transmission and align the crossmember bolt holes.






Excursion

6. Install the bolts.






7. Reconnect the wire harness to the frame.







8. Install the remaining nut and tighten both nuts.







F-Super Duty

9. Install the crossmember bolts.







10. Install the nuts.







11. Install the remaining nut and tighten both nuts.







All vehicles

12. Remove the high-lift transmission jack.

13. Lower the vehicle.