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  1. S

    Intermittent vibration at 70-75 MPH? - SOLVED!

    I attached a page from the 06 Ford service manual that’s the closest to what’s being discussed, I think. I’m learning a lot from the transfer case discussions.
  2. S

    AC not blowing cold, stuck hot

    I suppose start with putting gauges on the high and low side and see if the readings are reasonable. I don't have my Ford service manual in front of me but acpro on the web says for an 80F day 40-50psi on the low side and 175-210 on the high side. We'll assume you've got good airflow over the...
  3. S

    Various module communication issues and J2534 adapter suggestion

    What adapter/scanner/software are you using or would use for calibration?
  4. S

    Question? I jacked up rear put it in neutral engine not running

    I was thinking the Park pawl too. I’m not sure how it’s actuated in 4R70/75 but it seems a possible culprit. (I’m a C6 guy). In Neutral the transmission output shaft should be free to turn. With the engine off and no transmission fluid pressure there shouldn’t be a possibility of the wrong...
  5. S

    Question? I jacked up rear put it in neutral engine not running

    I suggest disconnecting the driveshaft from the differential and rotate wheels like you are doing. That will isolate the differential. It’s hard for me to believe the differential came unglued inside but it needs to be ruled out…or maybe not.
  6. S

    Not so Good Vibrations

    You've done a great job helping out the community of us 4WD Expedition owners. I'd do exactly what you're doing to get it back on the road soonest. And you retained the original versus sending it in as a core, as I'm a believer whatever is on my vehicle is probably in better shape than...
  7. S

    A/C EVAPORATOR

    Attached is what the’06 Service Manual says.
  8. S

    Not so Good Vibrations

    “The shift motor sense plate, an integral part of the gearmotor encoder assembly, informs the 4WD control module of the transfer case position.” But it’s not broken out in the attachments. “The electric shift motor is mounted externally to the gearmotor encoder assembly at the rear of the...
  9. S

    Not so Good Vibrations

    Yes, there’s a position sensor that provides input to the 4WD module. I’ll get something from the shop manual and post. Very nice write up.
  10. S

    Are we NO for ignition?

    I watched that FordTechMakuloco video before doing my manifold job and thought it may be possible without lifting the engine; however, after removing the splash shield I didn't see a way to get to 3 or so of the lower manifold nuts/studs. Also, I don't know how much difference there is in the...
  11. S

    Are we NO for ignition?

    Awesome! I don't normally monitor the upstream O2 sensors since they're always switching lean to rich. I've added alternator load monitoring, engine oil temp/EOT, trans temp, coolant temp/ECT, transmission gear selected, ignition timing (that's due to my former 2011 CR-V which had a factory...
  12. S

    Popping and clicking noise in front end

    I've read before the check valve in the vacuum line assembly going to the 4WD solenoid has caused issues with the popping and clicking. Since I have everything apart for an oil pump swap and possible bad lash adjuster, I got one of these: 4L3Z-3A788-AA. About $20. I have an '06 and of course...
  13. S

    Are we NO for ignition?

    Very interesting. Causation versus correlation... The misfiring is real, shouldn't be happening but it's unclear the role it's playing. I'd be looking at changing plugs in the near future if you're not sure how many miles they've accrued. Manifolds...we know from many threads over the years...
  14. S

    Removing air intake piece on 06 model

    The only downside to the air cleaner pipe picking up in the wheel well area is that it provides a nice path for vermin to get into the air cleaner plenum. Lots of chewed acorn shells in there…
  15. S

    Are we NO for ignition?

    Our ‘06s are rev limited to about 3K RPM in neutral and park. I see 0 or 1 misfires counted per drive, with the lone misfire happening on startup, best I can tell. Yes, you can see the misfire count in real time. I’m not sure if ForScan Lite can break it down by cylinder. I’ve never used...
  16. S

    Are we NO for ignition?

    I'll second whtbronco and ManUpOrShutUp's recommendations. In addition, with these engines and their age and you have an '06 3V (like me), it's so important to get powertrain data in real time or logged from the PCM. ForScan Lite runs on a pad or phone and works nicely with a bluetooth OBD...
  17. S

    2004 expedition will only move few feet forward or reverse

    I think you have to try to isolate the big pieces in the drivetrain. Disconnect driveshaft at the rear differential and see if it feels/spins ok by turning both the pinion flange and wheels. I’d drain transfer case fluid and look for bits and chunks. If ok, refill and check functionality in...
  18. S

    2004 expedition will only move few feet forward or reverse

    Is it 4WD…? Transfer case has to be considered.
  19. S

    Cross Threaded Again

    For the 2nd time in 7 years, I cross-threaded the back oil pump pickup tube bolt tonight. In 2017 at 100K miles, I did a full timing job plus lash adjusters, roller followers and oil pump as both phasers were noisy. At the time, the Melling M360 was the pump to use...Jasper was doing it...
  20. S

    Not so Good Vibrations

    System description is provided in the attachment from my service manual. Also, the manual clarifies the 4WD module is integral to the PCM. From what I can tell, like any PCM controlled solenoid/actuator like an injector, etc., 12V is always available and the PCM provides the ground on a...
  21. S

    Not so Good Vibrations

    I pulled the front driveshaft a while back when replacing the passenger side exhaust manifold since I noticed the front pinion seal was sweating. I really needed the SUNEX 312ZUM 3/8" Dr. 12mm 12 Point Universal Impact Socket for Ford Driveshafts...
  22. S

    Battery dying while driving

    I’d charge the battery, start it and put a voltmeter on the battery. You should see over 13.5 volts. If not, I’d suspect alternator regardless of store test results. Also, turn on headlights and heater/ac fan on high and see what happens. You should see around 13.5 volts if all is well...
  23. S

    Not so Good Vibrations

    Drae brings up a good point. Maybe a check of the 4WD IWE system to see if the vacuum lines, check valve and solenoid are working right. Maybe the IWEs are engaged at times when they shouldn't be... I'm in the middle of pulling the valve covers and front cover for another issue... I decided...
  24. S

    Not so Good Vibrations

    I feel your pain, once had a driveline vibration that was caused by an axle shaft bearing surface in my Bronco that had gone egg-shaped; that took a while to find. I don't think that's your problem as you've replaced both rear half shafts. Regarding the pinion bearing, I'd think you'd have...
  25. S

    5W-20 Ford recommended oil

    Easy for me to say… If you’re thinking about diving in, I’d do phasers, tensioners, chains, roller followers and lash adjusters and a Melling HV340 oil pump. At 100K’, both tensioners had blown seals and both phasers were noisy. Two followers on the right bank were beginning to go. Got my 06...

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