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Thread: TD4 gearbox fault

  1. #1
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    TD4 gearbox fault

    Hey Guys,

    We have a TD4 V6 and have just clicked over 300k km's. Over the past year we started getting intermittent restricted performance faults which have now turned into gearbox faults. Here's a summation of what occurs when the fault comes up:


    • Accelerating steadily when it gets to 70-80kmh the car revs don’t stay stable. It surges up and down around 1600 - 2000.
    • If the car is travelling over 80kmh and then slows down below 80kmh sometimes if you go to push the accelerator normally it will cause a gearbox fault as you speed up. If you let it fall to below 70kmh and then plant the accelerator to the floor it changes gear above 80kmh with no issue.
    • Driving 100kmh on the highway gives us no issues.
    • The really hot days, over 35 degrees, seems to cause this issue to increase. It also happens occasionally straight away after filling up fuel.
    • We tried on one occasion to use a diesel fuel injector cleaner which seemed to work for a short period.


    Just wondering if its a gearbox issue or a fuel injection issue?

  2. #2
    Join Date
    Jun 2013
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    Quote Originally Posted by TJ82 View Post
    Hey Guys,

    We have a TD4 V6 and have just clicked over 300k km's. Over the past year we started getting intermittent restricted performance faults which have now turned into gearbox faults. Here's a summation of what occurs when the fault comes up:


    • Accelerating steadily when it gets to 70-80kmh the car revs don’t stay stable. It surges up and down around 1600 - 2000.
    • If the car is travelling over 80kmh and then slows down below 80kmh sometimes if you go to push the accelerator normally it will cause a gearbox fault as you speed up. If you let it fall to below 70kmh and then plant the accelerator to the floor it changes gear above 80kmh with no issue.
    • Driving 100kmh on the highway gives us no issues.
    • The really hot days, over 35 degrees, seems to cause this issue to increase. It also happens occasionally straight away after filling up fuel.
    • We tried on one occasion to use a diesel fuel injector cleaner which seemed to work for a short period.


    Just wondering if its a gearbox issue or a fuel injection issue?
    It's possibly split manifolds, if you search on here for restricted performance in Discovery 4s you should get a fair bit of info.

  3. #3
    Join Date
    Jan 1970
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    St Helena,Melbourne
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    D4 TDV6 , TD4 is the 4cyl engine . lift the engine cover and look for oil spray or black sooty deposits, you need to have the error codes read to see if its an engine fault or a transmission fault, the surging aligns with a gearbox torque converter fault but cascading engine faults can also trigger a transmission fault.
    MY08 TDV6 SE D3- permagrin ooh yeah
    2004 Jayco Freedom tin tent
    1998 Triumph Daytona T595
    1974 VW Kombi bus
    1958 Holden FC special sedan

  4. #4
    Join Date
    Apr 2012
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    You need a code reader - read the codes and report back....

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