Question about Ford Explorer

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1999 Ford Explorer OHC (Automatic) Transmission flair between 2nd & 3ard- if I free the gas pedal at the 42 kmh flair it changes up properly* so I can continue accelerating. *(instead of changing down to first!) From the read out they tell me it is a defective magnet solinoid, however the problems relative to load and speed are always perfectly constant - no variations whatsoever. Therefore I believe the pcm is at fault. What do you think ? Can it be reprogrammed. Or can possibly I replace it. Is it installed outside of the transmission housing. Where ?

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  • David Stember Sep 11, 2010

    Do you propose that a defect in one or all of 4 Actuators and Solenoids could enable the transmission to perform in a perfectly consistant WRONG way - no variations whatsoever.
    Surely one or more faulty Solenoids would create various random events. What do you mean by poorly maintained ? How can I possibly maintain solinoids within the transmission housing ?
    ----- Thanks for your help -- I believe the pcm is at fault. What do you think ? Can it be reprogrammed. Or can I possibly replace it.
    Is it installed outside of the transmission housing. Where ?

  • David Stember Sep 11, 2010

    Please relate your opinion re. a possible transmission control module problem - can it be reprogramed or replaced - is it outside of the transmission housing --where ?
    Can you offer any other input/opinion -- is a magnet solenoid/actuater repair a feasable option for a non rich musician ?
    Or must I somehow get a replacement unit complete. Thanks in advance. David

  • David Stember Sep 11, 2010

    In Switzerland nothing is free ---- Please read my problem again - quote ---- "From the read out they tell me it is a defective magnet solinoid" ------ I can't reconcile this diagnoses with the perfectly consistent bad shift behavior under all conditions.

  • David Stember Sep 12, 2010

    Hi Ronkbron
    Many thanks for your input, I have tried unsuccessfully to locate a Module for my 4x4 Explorer. The link you sent me refers to a 2 wheel drive model and is not compatible. What do you think re. a corrupt pcm. Have you ever heard of such a problem. I have driven 20'000 km. with this problem which has not developed or changed at all in any way.
    Do you think a sticky or malfunctioning solenoid could possibly produce such consistent misbehavior ?

    thanks in advance David

  • David Stember Sep 12, 2010

    Hi 1kbron

    I think I have identified an Autozone Reman 4x4 pcm - but not for Switzerland - -- the problem is payment and delivery outside of the US.
    I have Visa and Paypal which work well with Amazon and also Ebay motors, however so far I have not been able to locate a possible dealer.
    Any ideas ?

    Thanks- David

  • David Stember Sep 12, 2010

    Hi 1kbron

    Many thanks for your last mail I'm beginning to see some light at last !
    My only wish at the moment is to locate some diagrams and info's re. the valve body. I have never seen one and have no idea. You mentioned a link with step by step instruction which I am unable to locate ?
    I suppose I must dismantle and remove and replace the old rusty exhaust system to access the oil pan.
    You write that cleaning in petrol etc. worked for you -- did you cure a similar malfunction -
    what was that ?

    How do rate your Fixya assistance ? I'm new to this site - still a complete beginner.

    Thanks again for your help. David

  • David Stember Sep 16, 2010

    looking forward to the pics and any valve body info's. I believe I should rate your assistance for you to recieve a fee of sorts ? how can I do this - you deserve - thats for sure. Regards David

  • David Stember Sep 26, 2010

    Very helpful -- A true Guru ! Many thanks



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If you want to know exactly what the problem is with your tranny, take it to a Transmission shop and have them perform a FREE Diagnostic. Once you know the faulty component, you decide if you can fix it or have somebody else do it.
Diagnostic of Automatic Transmissions requires expensive test equipment and specialized training.
Good Luck!! Don't forget to rate this post!!

Posted on Sep 11, 2010

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  • Rene J Solis Sep 11, 2010

    If you believe that the PCM and not the solenoid is the problem, this information will help you to remove and install the PCM. Unfortunately, without proper diagnostic, I am unable to give you an opinion, what I can do, is to assist you locating the components and give you an overview of what's needed to replace them.

    Location of the PCM

    the PCM must be pre-programed at the factory.

    Identification, description and location of the components of the Automatic Transmission

  • Rene J Solis Sep 12, 2010

    Hi David!!

    If it was my vehicle, and I do own an 97 Explorer, this is what I would do:

    Take the transmission fluid pan off, (like when you are going to change the fluid filter), remove the filter, remove the valve body (you'll find the step by step instructions on the AutoZone link I sent you, DO NOT TAKE VALVE BODY APART!) and deep it in gasoline, while there, activate all of the valves and shake it a little bit, the purpose of this is to loosen and remove dirt and debris from valve body, rinse valve body w/fresh gasoline and lay it on a towel, shake it and activate the valves to make sure no gasoline is left in the valve body passages. Re-install valve body, replace old filter and pan gasket, add 4 qts. of manufacturer recommended type transmission fluid and a bottle of Rislone Transmission Stop Slip and Sealant, or any available Transmission Stop Slip additive, (I mentioned Rislone because I have used it many times and it does work great every single one of them), check and add transmission fluid if needed to proper level. Drive the vehicle for 15-20 miles and if it worked, you'll feel the difference.

    This procedure is part of servicing an maintaining the transmission, is inexpensive and has worked for me before. I hope it works for you. Good Luck buddy!! I'll check on the ECC or ECM just in case. Keep me posted!

  • Rene J Solis Sep 12, 2010

    It is not as difficult as it sounds : - )

    Let me get you some pics.

  • Rene J Solis Sep 12, 2010

    Got some diagrams, I am going to need an email address to send them to you, this site only allows us to post images under 150k.

  • Rene J Solis Sep 16, 2010

    I need a email address to send them to please. About the rating, under the comment just click where it asks if the solution was helpful. Thanks

  • David Stember Sep 17, 2010 I 'm looking forward thanks again David


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Transmission Shift Points Do Have Much to do with time & Pressusre It Shifts @ 14mph 24mph 37mph and 45mph Upon NORMAL Exelleration >>magnet solinoid is Located INSIDE the Transmission PAN Mounted to the Valve Body, and there are 4 Actuators and Solenoids - A/T
1.Shift Interlock Solenoid, 2.Pressure Regulating Solenoid, 3. Shift Solenoid, 4. .Torque Converter Clutch Solenoid, If Poorly Maintained ALL these Items ARE Suspect or just One of them Testing them Individualy Will Discover

Posted on Sep 11, 2010


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