lubegard black in Subaru => big problems, pls help

Discussion in 'General Motoring' started by redphan, Jun 16, 2004.

  1. redphan

    redphan Guest

    I had a garage recently replace the transmission fluid in my subaru
    legacy. The garage also added LubeGard black (friction modifier. I
    believe the transmission consists of a torque converter, gears, pump,
    filter and an automatic clutch at the rear end to distribute power
    whenever the computer feels necessary. The car is a four wheel drive.

    The problem is that after adding the fluid all the gear changes and
    clutch engages/disengages have become very jerky. It'n no longer
    silky smooth like before. Adding LubeGard black is NOT recommended by
    Subaru, so why they added it is beyond me and they are a Subaru

    I had the garage change the oil again. That would have reduced the
    LubeGard in the tranny by about 50% because roughly half the oil still
    remains in the tranny. I live in Switzerland, no one here does a full
    tranny flush like in the USA. Despite the 2nd oil change, the problem
    still exists.

    I am fed up with the garage and don't want to go to them again. I
    would be keen to hear of any ideas on how to get rid of all traces of
    the LubeGard or to neutralise its effect. Thanks.
    redphan, Jun 16, 2004
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  2. redphan

    Edward Hayes Guest

    Every time you dain/refill you change~45% of the fluid so to get close to
    100% new you need about 4 drain/refills. However: if the lubguard is somehow
    formed a coating/bond on the shift bands then it may take a long while or
    never to get the stuff removed. I'm not to impressed with you sudo mechanic.
    Maybe someone on this NG will tell you how to do a home transmission flush
    or some transmission cleaner that would help. ed
    Edward Hayes, Jun 16, 2004
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  3. Hi,

    I'm not sure exactly what Lubeguard Black is or how it works, but in the
    US there's a cleaner called Trans-X that does a great job of removing
    varnish and gums. I don't know if it's available outside the States, nor
    if it would get this LB stuff out, but it might be worth asking around.

    Rick Courtright, Jun 16, 2004
  4. redphan

    Edward Hayes Guest

    Another thought: Are you sure that the transmission fluid used was Dexron 3
    Edward Hayes, Jun 16, 2004
  5. redphan

    redphan Guest

    Yes, it was Dexron III manufactured by Castrol.

    redphan, Jun 17, 2004
  6. redphan

    ed Guest

    Have a look at the Amsoil site ( There is a section somewhere
    that describes how to replace the trans oil completely by using the oil
    cooler line to the radiator. I've done it and it's the same method used by
    some trans shops who use a machine to do it more quickly, called a T-Tek.
    The motor is run at idle, and the oil comes out of the cooler line from the
    transmission, and you add oil at the dipstick tube until you have put in the
    total amount in the transmission (chek the driver manual or a shop manual
    for the quantity for your car, it's around 8 litres or so). The T-Tek is
    quicker because as the oil is pumped out of the cooler line, the T-Tek adds
    the same amount into the line going back to the transmission. Doing it
    manually is slower, but the results are the same, a total trans flush.
    Ed B.
    ed, Jun 29, 2004
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