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Thread: Disco 3/4 Automatic Transmission FAQ - 6 Speed

  1. #601
    Join Date
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    Ok, first oil sample taken after 12,000km on the BMV. A point worth noting here - I flushed probably around 18 litres through my transmission when I done the change (hard to tell exact amount as I was pumping it out of a 20L drum which is now very light), and even with that amount there is still a significant portion of the old LG6 in the oil. The additive pack is different between the two oils - specifically the calcium and phosphorus.
    BMV vs LG6.jpg
    The most recent sample from running the BMV shows the calcium and phos levels higher than unused BMV so I've still got a reasonable potion of LG6 floating around in there. Viscosity is also up, although the BMV is thicker than LG6, my current viscosity is currently in between the two. Theres also been a drop in contamination levels since the last sample when I changed the oils, however I would have liked to see a further decrease in the contamination levels. Below is the current trans sample results - second from the left 11-Jul-216 was sampled at trans failure.
    oil 6hp26.jpg
    So my take on this so far - my current flushing method does not work all that well I was pumping the fluid straight out from the cooler and refilling. So clearly this is not flushing the torque converter as I was hoping. So it may be worth finding someone with a full flush machine to do the job for you, or after the first oil change look at dropping the interval for an oil change down (I run out to 90,000km on the first oil change with some extra filtration).
    Shane
    2005 D3 TDV6 loaded to the brim with 4 kids!
    http://www.aulro.com/afvb/members-rides/220914-too-many-defender-write-ups-here-time-d3.html

  2. #602
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    Quote Originally Posted by shanegtr View Post
    So my take on this so far - my current flushing method does not work all that well I was pumping the fluid straight out from the cooler and refilling. So clearly this is not flushing the torque converter as I was hoping. So it may be worth finding someone with a full flush machine to do the job for you, or after the first oil change look at dropping the interval for an oil change down (I run out to 90,000km on the first oil change with some extra filtration).
    Bugger, it sounded promising.

    Looks like I'll stick to three/four dump and fills.

  3. #603
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    Quote Originally Posted by rick130 View Post
    Bugger, it sounded promising.

    Looks like I'll stick to three/four dump and fills.
    Tell me about it, it wasn't what I was expecting to see.
    Shane
    2005 D3 TDV6 loaded to the brim with 4 kids!
    http://www.aulro.com/afvb/members-rides/220914-too-many-defender-write-ups-here-time-d3.html

  4. #604
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    Apr 2012
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    Whyalla, SA
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    Excellent work regardless of the results as it has given insight. Disco 3/4 Automatic Transmission FAQ - 6 Speed

  5. #605
    Join Date
    Jul 2013
    Location
    Broadford, Vic, Australia
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    356,00 km and no shudder

    My 2007 D3 is sitting on 356,000km and no records of transmission service or fluid change in the history records that came with the vehicle. From what I can assume going by the books, I am the second owner and have clocked up 20,000km in the last 14 months or ownership. The auto has not even resembled acting up. It has done reasonably hard off road driving, heaving towing, 3t plus with the car fully loaded up at well over 600km in that trip alone, estimated 6t all up gross. Towed a boat and towed a jet ski, and the usual runs to the tip. V6 4.0 petrol still running as good as the day I bought it last year. But, on saying that, come May, I will be doing the service on the auto as a preventative measure. I cant afford to place it.

  6. #606
    Join Date
    Jan 1970
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    St Helena,Melbourne
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    Quote Originally Posted by TheDonsWay View Post
    My 2007 D3 is sitting on 356,000km and no records of transmission service or fluid change in the history records that came with the vehicle. From what I can assume going by the books, I am the second owner and have clocked up 20,000km in the last 14 months or ownership. The auto has not even resembled acting up. It has done reasonably hard off road driving, heaving towing, 3t plus with the car fully loaded up at well over 600km in that trip alone, estimated 6t all up gross. Towed a boat and towed a jet ski, and the usual runs to the tip. V6 4.0 petrol still running as good as the day I bought it last year. But, on saying that, come May, I will be doing the service on the auto as a preventative measure. I cant afford to place it.

    I believe that the petrol engines are easier on the trans than the TDV6 is, the earlier peak torque must shorten the lifespan. My D3 was a 1 owner (140k) stock standard never used offroad or towed and i doubt it will last that long, valve body rebuild has definitely given it a new lease of life so hoping it will go to 300k which by then will possibly be in some one else's ownership.
    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

  7. #607
    Join Date
    Oct 2023
    Location
    Tasmania
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    D3 trans shift kit

    Any body fitted a shift kit. They are a common trans, I've had a bit of a look for one but thought I'd test the forum out.

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