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Tim West
Tim West, ASE Certified Technician
Category: Ford
Satisfied Customers: 4638
Experience:  ASE Certified Service manager of Firestone
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2000 ford excursion, trouble codes, p0720, p0722, engine stalls

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2000 ford excursion, trouble codes, p0720, p0722, engine stalls when put into gear warm, fine cold
Thanks for visiting Ja.com
What engine size?
Customer: replied 7 years ago.
6.8 V10
Thanks, XXXXX XXXXX more than likely due to a bad output shaft sensor.

Removal
All vehicles

  1. Raise the vehicle on a hoist.



  1. Remove the belly pan.
  1. Remove the six retaining bolts.
  2. Remove the belly pan.

All vehicles



  1. Remove the rear transmission mount nuts.
  2. CAUTION: Be sure not to raise the back of the transmission too high, if it makes contact with the underbody, damage to the TSS and OSS sensors will occur.



Remove the rear transmission mount.

  1. Raise the transmission up off the rear crossmember support.
  2. Remove the bolts.
  3. Remove the rear transmission mount.



  1. Lower the transmission to gain access to the Turbine Shaft Speed (TSS) sensor, and the Output Shaft Speed (OSS) sensor.



  1. Remove the Turbine Shaft Sensor (TSS).
  1. Remove the bolt.
  2. Remove the Turbine Shaft Sensor (TSS).



  1. Remove the Output Shaft Speed (OSS) sensor.
  1. Remove the bolt.
  2. Remove the Output Shaft Speed (OSS) sensor.

Installation
All vehicles



  1. Install the Output Shaft Speed (OSS) sensor.
  1. Lubricate and install the Output Shaft Speed (OSS) sensor.
  2. Install the bolt.



  1. Install the Turbine Shaft Sensor (TSS).
  1. Lubricate and install the Turbine Shaft Sensor (TSS).
  2. Install the bolt.
  3. CAUTION: Be sure not to raise the back of the transmission too high, if it makes contact with the underbody, damage to the sensors will occur.



Install the rear transmission mount.

  1. Raise the transmission up.
  2. Install the rear transmission mount.
  3. Install the bolts.



  1. Lower the transmission on to the rear crossmember support.



  1. Install the rear transmission mount nuts. Excursion 7.3L, diesel



  1. Install the belly pan.
  1. Install the belly pan.
  2. Install the six retaining bolts.

All vehicles

  1. Lower the vehicle.

 

Customer: replied 7 years ago.
TSS AND OSS HAVE BOTH BEEN REPLACED NO CHANGE
No problem, disconnect the voltage regulator part of the alternator and see if the problem goes away.
Let me know.
Customer: replied 7 years ago.
DICONNECTED VOLTAGE REGULATOR, NO CHANGE, OD LIGHT FLASHES AND DIES IN GEAR, RUNS FINE IN PARK AND NUETRAL
Do you have a scan tool?
Customer: replied 7 years ago.
YES, FORD NGS, AND SNAP ON
Great,

1. Access mode $06 through the scan tool and look for any escalated misfire counts under Test Identification (TID) 53.

2. If any cylinders show an elevated misfire count, replace the Coil-On-Plug (COP) unit on that cylinder. Clear the PCM's adaptive memory and road test the vehicle for continued symptoms. Recheck mode $06 as necessary.

3. If mode $06 did not reveal any elevated misfire counts, monitor the alternator's diode pattern on the B(+) terminal of the alternator with the engine running, blower motor running and headlights turned on. Replace the alternator as necessary.

4. Access the OSS located on the top of the transmission tailshaft housing and inspect the connector for a good connection.
The OSS contains a Grey/Red (GY/RD) wire which supplies it a ground and the signal circuit is a Dark Blue/Yellow (DB/YE) wire.

5. Measuring resistance of the OSS should indicate a reading of 781-1,979 ohms. If the sensor is open, replace it.

6. Check the DB/YE wire for an open circuit or short to ground between the sensor connection and PCM pin 84 and service the circuit as needed.
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