How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Chris (aka- Moose) Your Own Question

Chris (aka- Moose)
Chris (aka- Moose), Ford Technician
Category: Ford
Satisfied Customers: 31467
Experience:  16 years experience with Ford.
Type Your Ford Question Here...
Chris (aka- Moose) is online now
A new question is answered every 9 seconds

2002 ford explorer has a transfer case problem.If I unplug

Resolved Question:

2002 ford explorer has a transfer case problem.If I unplug electrical connector the problem goes away.It has a automatic four wheeldrive,and it feels like it is being engaged paritally on.In four wheel drive mode it goes away.I replaced module in glove box,symptoms still there.I checked sensors,and cant find anything wrong.I dont know if it is a input to controller,or possibly something wrong in transfercase.
Submitted: 3 years ago via CarComplaints.com.
Category: Ford
Expert:  Chris (aka- Moose) replied 3 years ago.
Hello, I'm Chris.
I will do my best to answer your question fast and accurate using the info you have provided. Thanks for visiting Just Answer.

There are transfer case and wheel speed sensors which need to be monitored with a scan tool to see if there is a difference when driven straight down the road. Any thing over 3mph difference causes auto 4x4 activation. The most common cause is tire circumference difference. You need to raise the vehicle and use a nylon tape measure and wrap it around each tire. All must be within 1/4 inch circumference.
Customer: replied 3 years ago.
Tires are brand new and already scoped sensors with ids and are within specifications.
Expert:  Chris (aka- Moose) replied 3 years ago.
Since all the sensors are showing the same speeds then it has to be the tires, you have already addressed everything else. You still need to measure them regardless if there new.
Customer: replied 3 years ago.

If it would be the tires what is actually turning the the electromagnet on in the transfercase?If tires circumference are off what is computer looking at,and can you see that on any equipment?

Expert:  Chris (aka- Moose) replied 3 years ago.
The clutch is triggered on by the module. When the module sees a wheel speed or transfer case front or rear speed sensor difference it thinks one tire or one axle is spinning (like on ice) so it engages the transfer case via the clutch. Yes you can watch all the speed sensors and record there activity while driving and while its acting up to verify if one or more sensors are reading off compared to the others. If its the tires having different circumferences then one wheel speed sensor will be showing a different speed than the others.
Customer: replied 3 years ago.
I looked at wheel speed sensors and couldnt find a problem with them either
Expert:  Chris (aka- Moose) replied 3 years ago.
Looked at them or monitored them while driving?
Customer: replied 3 years ago.
With ids i monitored them while driving down road when symptoms were occuring.
Expert:  Chris (aka- Moose) replied 3 years ago.
All showed dead on the same exact speed at all times, did you watch the actual speed or did you select graph to see if there were any spikes?
Did you also monitor the front and rear transfer case speed sensors?
Customer: replied 3 years ago.
Yes I did all of the above questions you asked.I checked sensors twice to make sure and couldnt find any abnormal readings.I went through all associated tests that ids has to offer and everything looked good.The only thing I did see in memory was a open right front speed sensor code,but I monitored that sensor when problem is occuring and I dont see any difference between left or right sensor under data logger.I dont know if that code was set because vehicle was up in air when listening for the transfer case noise the first time.
Expert:  Chris (aka- Moose) replied 3 years ago.
Ok, now that I know all this extra info, you can rule out the sensors and tone rings and shift motor and module and tires. You now need to monitor, the VSS in the PCM and shift motor and the ABS. at some time there all not matching and this is commanding the module to activate the clutch, I assume you did watch the clutch being commanded on with the scan tool, if you did not then that is also needed. If there is no command of the clutch then you have a ball ramp worn in front of the clutch inside the transfer case.
Customer: replied 3 years ago.
I did see a command on the clutch thats why I unplugged connector to see if it was in transfer case or if it was a command.I just couldnt see why it was being commanded and what input was making the command.I looked at sensors,and couldnt find problem so I thought maybe I was missing something or didnt fully understand operation ..At about 35mph do you know what the command spec is supposed to be?What if the command amount is right but the clutches in transfer case are bad could them slipping be my problem?
Expert:  Chris (aka- Moose) replied 3 years ago.
The command should always be zero percent unless it sees the need to prevent wheel slippage.
Chris (aka- Moose), Ford Technician
Category: Ford
Satisfied Customers: 31467
Experience: 16 years experience with Ford.
Chris (aka- Moose) and 9 other Ford Specialists are ready to help you

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • AlvinC answered a question about my Ford truck that only someone with an in-depth knowledge of his subject would have known what was going on. Rich D USA
< Last | Next >
  • AlvinC answered a question about my Ford truck that only someone with an in-depth knowledge of his subject would have known what was going on. Rich D USA
  • Because of your expertise, you armed me with enough ammunition to win the battle with the dealer. They are installing a fuel filter and fuel pump at no charge to me. Molly USA
  • I needed help with my car on Saturday morning....got a response in 5 minutes, and it was the perfect solution. Thanks again to your service. Jason V. Kirkland, WA
  • I do know, after going though this with JustAnswer, that I can somewhat trust my mechanic but I will always contact you prior to going there. BR New Jersey
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
  • used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future. David L. Richmond, TX
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil Marysville, CA
 
 
 

Meet The Experts:

 
 
 
  • Ron's Avatar

    Ron

    ASE Certified Technician

    Satisfied Customers:

    20036
    23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
< Last | Next >
  • http://ww2.justanswer.com/uploads/FO/fordguy4u/2011-12-17_222940_HPIM1257.64x64.JPG Ron's Avatar

    Ron

    ASE Certified Technician

    Satisfied Customers:

    20036
    23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka- Moose)'s Avatar

    Chris (aka- Moose)

    Ford Technician

    Satisfied Customers:

    21378
    16 years experience with Ford.
  • http://ww2.justanswer.com/uploads/JM/jmcdo28/2012-2-23_01655_resized.64x64.jpg John Mc's Avatar

    John Mc

    Ford Technician

    Satisfied Customers:

    5493
    19 years Ford Lincoln Mercury experience
  • http://ww2.justanswer.com/uploads/wmarti7/2009-4-18_04332_Avatar.jpg Chuck's Avatar

    Chuck

    ASE Certified Technician

    Satisfied Customers:

    1684
    33 Years Experience,Ford Senior Master,ASE Master,L1 Advanced Engine Performance
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

    Richard

    ASE Certified Technician

    Satisfied Customers:

    1505
    12 years at a Ford Lincoln/Mercury and Jaguar dealer as a technician and shop foreman.
  • http://ww2.justanswer.com/uploads/BA/baddad1/2013-8-30_131413_11848761610058140852271553042976n.64x64.jpg Mike V.'s Avatar

    Mike V.

    Auto Service Technician

    Satisfied Customers:

    767
    25 years experience on all makes and models, Licensed NYS Inspector.
  • http://ww2.justanswer.com/uploads/lostrider/2009-9-26_23144_php4VNWAA_c1PM1.jpg lostrider's Avatar

    lostrider

    Ford Technician

    Satisfied Customers:

    2940
    ASE Master Technician, Ford Senior Master Technician,Diesel certified, ASE Master, 22 yrs FORD exp.