XG300 Trans question...

Discussion in 'Hyundai Grandeur / Azera / XG' started by Essex, Mar 4, 2008.

  1. Essex

    Essex Guest

    Hi all, I recently bought a 2000 XG300 with the 5 speed trans. Only 65k
    klms and generally drives perfectly.

    The only thing that seems a little odd is when accelerating up a medium to
    steep hill, the trans holds on to 2nd or 3rd for longer than seems
    necessary. Even if I back off the throttle to encourage an up-change, it
    hangs on.

    Is this a characteristic of this trans, or is it something that might need
    attention? When driving on the flat the box is quiet, smooth and changes

    Thanks for any input.
    Essex, Mar 4, 2008
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  2. Essex

    mykey Guest

    adjust transmission bands, can be done by good shop.
    also check fluid. MF.
    mykey, Mar 4, 2008
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  3. Essex

    Dan K Guest

    I'd change transmission fluid, I just do an easy drain and fill. App 6 qts,
    but be sure to use Hyundai transmission fluid ($$$). Also, I'd call a
    dealer and ask if there are any updates to the computer...yours may need to
    be updated. There should be a sticker on the drivers door indicating what
    rev you have. Transmission shifting might be affected by computer

    Dan K, Mar 5, 2008
  4. Essex

    hyundaitech Guest

    If it's shifting smoothly and otherwise performs normally, it's probably
    normal. *Do not* attempt any mechanical adjustments to this
    A quick scan of the reprograms available shows several to resolve shift
    flare or shudder, but none that would change the shift schedule.

    You should expect that changing the fluid will also not change shift
    schedule. Of course, if the fluid condition warrants a change, then
    changing the fluid (SPIII only) is a good idea.
    hyundaitech, Mar 5, 2008
  5. Essex

    B Crawford Guest

    Hello Essex,
    I drive a XG300 with 122,000km as described. Your experience sounds
    similar to mine. I have always found the tranny very hard to second guess as
    to what it will do as well as slow to seek out a different gear. The dealer
    said that all software updates were done but yes this tranny was slow. We
    live in mountains & yes it does shift down going up grades, holds longer
    than I would expect, & often going down hill on the other side of the slope
    will gear up & then shift down again much like you might with a standard. I
    do seem to find that the damn expensive Hyundai tranny fluid darkens & I
    have flushed mine 3 times now (as per online manual directions). Other than
    these comments I don't think the function of the tranny has changed at all
    since new.
    BTW, watch out for the mass air flow sensor malfunction on this model
    (this Bosch part is not cheap!). Your mileage is a bit low but the age may
    count too. Suspect it if you get a code set indicating 2, O2 sensors need
    replacing + the car starts to sporadically act like it's getting
    insufficient fuel.
    B Crawford, Mar 6, 2008
  6. Essex

    Essex Guest

    Thanks for your help guys. Fluid is clean and at correct level. I will
    check for latest firmware. I've found that I can override the tendency to
    hold on to the lower gears using the manual shift function on hills where

    With B Crawford's experience, it sounds like this is fairly normal
    behaviour for this box.

    Thanks again!
    Essex, Mar 6, 2008
  7. Essex

    hyundaitech Guest

    Don't let the discoloration of the transmission fluid bother you too much.
    The SPIII fluid tends to darken early. As long as it stays reasonably
    transparent (although possibly brown) and still has the original odor, it
    should be okay.
    hyundaitech, Mar 6, 2008
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