Transmission fluid
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  1. #1
    Tadpole
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    Default Transmission fluid

    Hi Guys,

    Ok firstly, i would like to apologise in advance if this has been asked before, however i need a bit more clarification on the process involved.

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    Do we have a write up or guide of some sort on changing transmission fluid on a C5 2005 model V6 variant?

  2. #2
    Contented Peugeot Driver addo's Avatar
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    It was covered from an amateur's POV by one of the guys on French Car Forum: French Car Forum ? View topic - Gearbox Grumble? (4HP20)

  3. #3
    1000+ Posts
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    We had a c5 v6 and i do recall looking it up on the net ,checking the level with the engine running ,at the back of the gearbox behind the exhaust ,can be quite interesting ,especially when the rad fans cut in and blast even more hot air down on you ,make sure you have it on stands or a hoist, pugs ps measure how much oil comes out then replace that amount as a reference ,then do your level check

  4. #4
    Fellow Frogger!
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    If it is the 4hp20 ZF box I remove the air cleaner
    Take out the breather plug (blue)
    Prise out the breather insert (gives more diameter for filler tube)
    Undo drain plug and collect all of oil (usually black) yuk
    Place this oil in container where I can see the level
    Duplicate this level on an identical container with a marking pen
    When the oil has drained out ( allow half an hour) replace the drain plug then place your carefully selected filler tube into the breather hole and suspend somewhere the attached funnel
    Squeeze a tooth pick or like down the side of the filler tube to allow air to vent from the box or be prepared to wait many hours
    Fill the second container to the marked level and pour in oil this will take about 30 minutes
    When the oil is finished tap the filler insert back in with a soft hammer and replace the cap
    Drive for a 100 kms or what ever and repeat do this twice ie 3 changes in total this gives 40 ml of corrupted oil remaining and "that ain't to bad"
    As a note my ZF boxes are slow to change into top when the oil is broken down

  5. #5
    Fellow Frogger!
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    Pps
    The oil to use is Nulon fully sythnthetic
    It even notes it's suitability on the label on the newer containers
    LT something or other

  6. #6
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    The fluid spec for the ZF box is ESSO LT 71141

  7. #7
    Fellow Frogger!
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    That's it the Nulon is completely compatible and superior

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