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Transmission jerking on 1st speed

Discussion in 'Stock 2006 -2010 Explorers' started by Larkin_1, September 16, 2013.

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    1. Larkin_1

      Larkin_1 New Member

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      Hey everyone! First of all sorry for my English. I have a little problem with transmission jerking on first gear, for example in traffic jam. I wil try to describe it- when the car is moving at at minimal speed (5-10 km/h) on the first gear, when I add gas- the car jerks (twitches) and then the transmission shifts to the secon gear( the shift is smooth). In all other situations the transmission works great, for example on a high way. The scanner shows that I have a latest version of Tcm calibration. I have this problem for 2 years and cant solve it. What can it be?
       
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    3. El Duque

      El Duque Active Member

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      I had a 2008 and currently own a 2010, both with V8's. They both did/do the same thing. I had the trans on the 2008 updated by the dealer, and it still did it. The 2010 is supposed to be "fixed" but still shifts like garbage. Don't know the answer but at least you're not alone!
       
    4. Larkin_1

      Larkin_1 New Member

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      Thank you for reply. I believe that the problem is in TCM calibration, because some have this problem, some-not. I know that there are different TCM calibrations for different model years, and while flashing it is easy to choose a wrong one.
       
    5. Larkin_1

      Larkin_1 New Member

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      Today i have connected the scanner and it showed me that i have the latest TCM Calibration 6U7A-12A650-KNC and doesnt update it. I thought that the latest was 8L2P-7J104-AC. Can somebody explain this?
       
    6. Larkin_1

      Larkin_1 New Member

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      Please, can anyone ask ford customer service in US concerning the TCM Calibration. Which one is the last one- 6U7A-12A650-KNC or 8L2P-7J104-AC? Unfortunately US customer service doesnt want to answer me, because i am from Europе:( Our local dealer is completely crap, they only have information about Mondeo and Focus.
       
    7. Larkin_1

      Larkin_1 New Member

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      Tried again to contact my local dealer- no answer...is it so complex question?
       
    8. willied

      willied Well-Known Member

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      I've had this issue with mine ever since I got it. I've tried a few things - updated the TCM calibration, replaced the throttle sensor, and changed the trans fluid. None of those helped a bit. I did get it checked out at a dealer one time and they said it's probably the trans solenoid, but that would cost at least a $1000 to fix. So I've just given up on it.
       
    9. Larkin_1

      Larkin_1 New Member

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      I dont think that it is a mechanical problem. I will try to download 8L2P-7J104-AC calibration and see if the Ford IDS Scanner will update it.
       
    10. Henders

      Henders Member

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      Try resetting the PCM. Basically, Remove the Negative Battery lead and isolate it. Then connect a wire between the Positive battery cable and the Removed Negative Lead (Wire NOT the terminal). Leave it that way for about 15-30 minutes. Afterwards, remove the shorting wire and reconnect the battery. You will then have to re-train the system.
      For the idle (let it idle for about 5 minutes), then turn on ALL accessories (Lights, radio AC's...) and let idle a few more minutes. Then set up your car for about a 15 minute drive. Start slow and let the computer relearn the shift points (try to make sure you run through all the shift points). Then take it out on the highway. This might need to be repeated a couple of times (relearn process).
       
    11. Larkin_1

      Larkin_1 New Member

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      Conected the scanner today. I have the latest calibration 8L2P-7J104-BC. So the problem is not electrical. But still- this trasmission is very very smoth, the only problem oсcurs on slow speeds. Well, will close my eyes on this, and continue enjoy driving explorer :)
       
    12. Larkin_1

      Larkin_1 New Member

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      Well, have have passed 150000 miles, still have this transmission jerking in the 1st gear, maybe there is a solution appeared during this past years?
       
    13. willied

      willied Well-Known Member

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      It's probably contamination of the solenoids due to a poor design. I think I have the same issue, but I don't want to spend the money to fix it since the issue is pretty minor.
       
    14. Larkin_1

      Larkin_1 New Member

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      Over 200k miles and cannot solve this issue, it’s easier to sell a car rather than fix this
       
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    15. Larkin_1

      Larkin_1 New Member

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      Over 200k miles and cannot solve this issue, it’s easier to sell a car rather than fix this
       
    16. alawneh

      alawneh Member

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      Dear Larkin_1
      This is a well know issue about explorer, hard downshifting from 2nd to 1st gears specially during deaccelaration on trafffic.
      I suffered this issue more than 2 years, the only solution is to change the trans solenoid with new fluied and filter then reprogramming it, otherwise nothing will help you
       
    17. alawneh

      alawneh Member

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      Ok. Then 150000 mi, how often are you changing the trans fluied and filter, that is why some has this issue and some hasnt.. refering owner manual you should change them every 40000 km, in fact you need to change them earlier let say every 30000km to keep it from any metals. Otherwise trans will start making hard up or down shifting.

      Hope that answer your confusion questions
       
    18. Larkin_1

      Larkin_1 New Member

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      Unfortunately the problem doesn’t deal with oil. Since I bought this car, I change transmission oil and filter every 35000 km...
       
    19. alawneh

      alawneh Member

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      That is.... if the trans is already intact changing the oil and filter will help... if the trans is infected then you need to change the solenoid...
       
    20. Larkin_1

      Larkin_1 New Member

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      Thanks for help! Is it possible to buy new solenoids separately?
       
    21. Explorer_PL

      Explorer_PL Elite Explorer

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    22. alawneh

      alawneh Member

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      Finally ford company realized that they couldn't make a good solenoids, so now the new solenoids come from Germany with ford sticker....
       
    23. Christobal65

      Christobal65 Active Member

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    24. alawneh

      alawneh Member

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      Without reflash the PCM it will take along time to start shifting smoothly, and in some cases the problem will stay as it is.
       
    25. Christobal65

      Christobal65 Active Member

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      I'd clear the KAM, which would force it to relearn everything, but does the valve body have to be flashed into the PCM for it to even work? I know some of the components require the PCM to be flashed for them to even operate.
       
    26. alawneh

      alawneh Member

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      This is hard question to me. May some friends answer it.
       

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