Weird DCCD Problem with an '05 STi

Discussion in 'General Motoring' started by MdTitansFan, Aug 19, 2005.

  1. MdTitansFan

    MdTitansFan Guest

    I have a new '05 STi (3K miles on it now), and recently (within the
    past 2-3 weeks) started experimenting with the DCCD Controls.
    Normally, I leave it set on Auto, but this morning I switched it over
    to manual, and had it set in the Lock position. As I was backing out
    of the parking spot I was in, the car was moving fine, until I was just
    about completely out of the spot. Then, it started to feel like
    someone pulled the hand brake (which didn't happen), and like gears
    slipping from directly under the car. I stopped the car, and put it in
    first, and started to pull forward, with the same result. So, I
    stopped the car, took it out of gear, and flipped the DCCD switch back
    to Auto. The car handled fine again. Later, once I reached my work's
    parking lot, I stopped the car again, and switched the DCCD back to
    manual, in the Lock position again. I pulled around the lot (no more
    than 10 mph), and it felt okay. I stopped the car, and started to go,
    and it felt like gears slipping from directly under the car again. So,
    I stopped, and switched back to Auto, and the car felt fine.

    Has anyone experienced anything similar to this? I just wanted to
    check if it was a known issue, before I scheduled an appointment with
    the dealer.
    MdTitansFan, Aug 19, 2005
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  2. Dave Morrison, Aug 19, 2005
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  3. MdTitansFan

    JD Guest

    Its supposed to work that way. If you are not on slippery surfaces, you
    should leave it fully open or on auto. You only use full lock if you are
    headed in a straight line and on slippery surfaces. What it does is lock
    the differentials so all wheels turn at the same speed. It disables the
    stuff that the differential is supposed to do. In fact, going around
    corners on dry road with it locked can do serious damage if you do it long
    enough or often enough.

    I would have a look at how the locking center diffs are supposed to work
    before you start playing with it.
    JD, Aug 19, 2005
  4. MdTitansFan

    k. ote Guest

    Don't bother going to your dealer. This is normal: when the arc of the curve
    you're turning around is so tight like that, that weird feeling you're
    experiencing is actually the tires scrabbling along.

    Here's something else a little freaky, but apparently normal:

    .. Turn DCCD on.
    .. Turn it so it's just one notch up from wide open.
    .. Take a really, really right corner, steering at maximum, at the slowest
    speed you can, in a parking lot.
    .. Freak out with the weird grinding/squealing noise.

    That's apparently normal too.

    Leave it in Auto at all times unless you know what you're doing, can live
    without the auto-mode assistance (auto-mode senses when you're in a sharp
    turn and actively supports control of the vehicle with a touch of
    understeer) and are either going in a straight line, or are on extremely
    slippery surfaces.

    (FWIW, I own an '04 STi and it does the exact same thing. How do you like
    your new purchase?)
    k. ote, Aug 31, 2005
  5. MdTitansFan

    k. ote Guest

    JD wrote:

    In a way, I think it's our job as been-there STi owners to educate him. BTW,
    I did that ECU reflash and it eliminated all ping. I'm a much happier
    camper, although it feels just a tad less powerful in my daily commute. I'm
    sure it's my imagination.
    k. ote, Aug 31, 2005
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