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Thread: Had transmission service last week - now something is wrong

  1. #21
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    My son's D3 V8 had some alternative fluid in the transmission when we got it after it had been serviced by the previous owner. We pulled it out and replaced it with Lifeguard 6 as soon as we got it home after I read on the supplied invoices what oil had been used. The car is now up to 230,000km with no transmission issues at all so it doesn't seemed to have been harmed by the alternative oil, luckily. As for yours, the blurb on the web says it is suitable for D3 and D4 ZF 6 speed, but I certainly would not have used it.

  2. #22
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    The issue with alternative oils is not in the short term but the long term impact on the gearbox.
    REMLR 243

    2007 Range Rover Sport TDV6
    1977 FC 101
    1976 Jaguar XJ12C
    1973 Haflinger AP700
    1971 Jaguar V12 E-Type Series 3 Roadster
    1957 Series 1 88"
    1957 Series 1 88" Station Wagon

  3. #23
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    Is anyone technically minded here? As a complete novice on both oils and transmissions I understood how you would get more long term more wear and tear etc but I’m at a loss to understand he mechanics of how it has an instant effect on the smoothness so if someone can explain it I’d love to learn

    curiosity kills

  4. #24
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    Quote Originally Posted by Lukeis View Post
    Is anyone technically minded here? As a complete novice on both oils and transmissions I understood how you would get more long term more wear and tear etc but I’m at a loss to understand he mechanics of how it has an instant effect on the smoothness so if someone can explain it I’d love to learn

    curiosity kills
    Oils have various additives and viscosities. Those both play a part to how the complex interactions of clutch plates occur. An oil that does not conform to the specification may allow slippage between clutch plates, may flow too fast or slow through the valves etc. All this equates to how gears change. Oil flows through valves at a rate and clutches slip at certain rates dictated by the oil. Mess with this and you have the potential for poor performance.
    This is no different to the engine which is why we stress to meet the Ford specs as these engines seem to be sensitive.
    2010 TDV6 3.0L Discovery 4 HSE
    2007 Audi RS4 (B7)

  5. #25
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    ZF do have an approved aftermarket lubrication list for their products. Currently there is no aftermarket approved oil as a replacement for LG6,8 or 9
    https://aftermarket.zf.com/remotemed...e-ml-11-en.pdf
    There are a few oil products out there that claim to meet specs, but nothing that ZF themselves have approved yet
    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

  6. #26
    Tombie Guest
    Quote Originally Posted by shanegtr View Post
    ZF do have an approved aftermarket lubrication list for their products. Currently there is no aftermarket approved oil as a replacement for LG6,8 or 9
    https://aftermarket.zf.com/remotemed...e-ml-11-en.pdf
    There are a few oil products out there that claim to meet specs, but nothing that ZF themselves have approved yet
    Spot on!!!

    As one of the primary chemicals of the blend is not available to other blenders I would question if they truly do meet the full specifications!

  7. #27
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    Quote Originally Posted by Tombie View Post
    Spot on!!!

    As one of the primary chemicals of the blend is not available to other blenders I would question if they truly do meet the full specifications!
    Which is that?
    2010 TDV6 3.0L Discovery 4 HSE
    2007 Audi RS4 (B7)

  8. #28
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    Kryptonite

  9. #29
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    Quote Originally Posted by PerthDisco View Post
    Kryptonite
    Had transmission service last week - now something is wrong
    2010 TDV6 3.0L Discovery 4 HSE
    2007 Audi RS4 (B7)

  10. #30
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    Just to close this one out.

    I got the car back today with a gearbox full of ZF Lifeguard 6 and it feels amazing. I didn’t think there was anything wrong with it to start with but now I know how smooth a car can be.

    Thanks all all for the input, happy to have a good result.

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