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gearbox solenoids

Discussion in 'Land Rover Freelander' started by gordoncoll, May 23, 2017.

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  1. gordoncoll

    gordoncoll Active Member

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    hi guys,

    any one know the best place for these? best place to buy that is not the best for them to be fitted I am assuming that is the geardox !!!!!!!.


    Preferably without them being thesame cost of a secondhand td4 auto box !!
    or does anyone know of or have a good 2nd hand td4 jatco 2003- box for sale :)


    Cheers
    Gordon
     
  2. Nodge68

    Nodge68 Well-Known Member

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    The solenoid valves aren't that expensive. You'll only need 1 or 2 at most. Are you sure that the solenoids are the problem? The barrel connectors are a more likely cause.
     
  3. gordoncoll

    gordoncoll Active Member

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    naw they are all new had all the wiring replaced, guy tells me the solenoids are showing up faults, might have been shorted by the wiring which had worn through, forgive my stupidity but where are they located????

    even with all new wiring and new brake switch etc I still have f4 and hdc light on,
     
    Last edited: May 23, 2017
  4. Nodge68

    Nodge68 Well-Known Member

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    Do you know which solenoids are showing as faulty? They are fitted to the gearbox valve block. They are covered by the sump pan, on the front of the box.
     
  5. gordoncoll

    gordoncoll Active Member

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    my generic code reader says p1748, I can try to ask the bloke who did the wiring etc already being 700 quid down just to get this and the diff mounts done I really would like to get the cheapest way to do it possible . Local auto specialists are saying 400-450 for all the solenoids changed!
     
  6. Nodge68

    Nodge68 Well-Known Member

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    The solenoids can be tested, so there's no need to blanket change them. Code P1748 is usually 2/4 Brake Duty Solenoid open or short circuit
    The 2/4 Brake Duty Solenoid is 2nd from bottom.
    A resistance test of the solenoids would be the next logical step
    Has the box fluid been changed? That's the first job to do on an auto box. Fresh cures all kinds of gearbox problems.
    Code P1748 can also point to a TCM malfunction.
     
    Last edited: May 25, 2017
  7. gordoncoll

    gordoncoll Active Member

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    oil has been done but as I say the xyz (?) cable had got mangled so the guy who had it suspected the solenoids had shorted out. is changing solenoids do able at home? I can give it a crack I dont mind a bit of delving !what I dont want to do is something I will end up stuck halfway through !
     
  8. Nodge68

    Nodge68 Well-Known Member

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    The solenoids are diy job. There's no point in replacing good ones though. Just change the solenoids you have codes for. I'd be checking the resistance, before replacement anyway.
     
  9. gordoncoll

    gordoncoll Active Member

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    nodge

    a cheeky request but can you point me in the direction of a guide for removing the pan and changing the solenoids anywhere? I have done a search to no avail.
    and I dont posess a multi meter so I cant check, given that I know all the wiring is good I am going to have to trust the diagnosis from the garage
     
  10. Nodge68

    Nodge68 Well-Known Member

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    Before starting a job like that. It's worth doing a bit of testing, using Hippo's guide. I'd buy a digital multimeter (DMM). A reasonable DMM can be bought in Argos for around £20. This would do all you need in the way of testing the solenoids and much more.

    All the resistance values and how to probe for them are available on Hippo's threads.
     
  11. gordoncoll

    gordoncoll Active Member

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    Right my 2/4 brake duty solenoid is the culprit, got the place that did the other work to tell me today. I have a new one coming. How hard to change? Can i do it on axle stands on the drive? Is there a thread of a how to anywhere? How much atf am i gonna lose?
     
  12. Nodge68

    Nodge68 Well-Known Member

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    Very easy to change. You shouldn't loose any ATF fluid, except for a few drips. Take the sump off, once the cooler is out the way. Then locate and remove the correct solenoid valve. Replace the solenoid and refit the sump with a bit of RTV.

    This is the valve block, showing the solenoid positions. I borrowed this pic off the net. Jatcosolenoids.jpg
     
  13. gordoncoll

    gordoncoll Active Member

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    On axle stands?
     
    Last edited: May 30, 2017
  14. Nodge68

    Nodge68 Well-Known Member

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    Yes get the front up, to give you space. You'll be working on your back, so get as much space as you can;)
     
  15. gordoncoll

    gordoncoll Active Member

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    if I want to change the atf can I use Texamatic 7045E or an equivalent??????? seems to make more sense as this is a higher specced fully synthetic and is the replacement for the other stff , bmw use it and it is cheaper than the the original spec tackle
     
  16. Nodge68

    Nodge68 Well-Known Member

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    My preferred ATF for the Jatco and many others is Carlube ATF-U. It's about £26 a gallon and far exceeds the original LR spec fluid.
     
  17. gordoncoll

    gordoncoll Active Member

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    thanks for all the advice, once again this forum has been great


    changed all 9 today , thought as I was in there I may as well, I have a set of 8 plus a non working 2/4 duty if anyone wants em????
     
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