Tribeca with shuddering automatic transmission

Discussion in 'Subaru Tribeca' started by Don Dunlap, Feb 8, 2006.

  1. Don Dunlap

    Don Dunlap Guest

    I have a new Tribeca with a little over 6000 miles. The problem is the
    transmission shudders when shifting from second to third gear at times. It
    is acting as if it can't quite make the shift and moves back and forth until
    it finally finds it.

    My guess at first was the software that creates the shift. I took it to the
    Subaru dealer for the 6000 mile oil change and they were able to recreate
    the shudder. They erased and reloaded the memory in ECU and performed some
    other tests like line pressure, etc.

    The problem still exists and I called the Service Manager to advise him. He
    is going to check with Subaru to see if there are any other reports of the

    Has anyone else encountered this problem in a Subaru transmission? What is
    happening is a little hard to describe, but as I said, it seems as if the
    transmission can't find third gear and is shifting back and forth rapidly
    trying to shift. I thought that maybe a valve is not opening or closing or
    a spring is not functioning properly, but I haven't worked on an automatic
    transmission for about 45 years and I believe that they have changed a
    little in that time.

    Don Dunlap
    Don Dunlap, Feb 8, 2006
    1. Advertisements

  2. Don Dunlap

    Ratatooie Guest

    Try testing your tranny fluid level repeatedly under different conditions to
    see if the level is right. It is my experience that "full" one day is "not
    so full" the next day... so it is very easy for someone to "fill" it at a
    mechanic and have it need more fluid later. There are A LOT of knooks and
    crannies in there.....

    Check your tire presure lately? Subaru transmissions and torque converters
    do not like even small differences in circomference of the tires. Even 1
    pound off between left and right rear tires can cause shuddering under
    different conditions.

    If you give it a little more or less gas when it shudders, what happens
    then? What RPM is the engine when it shudders?
    Ratatooie, Feb 8, 2006
    1. Advertisements

  3. Don Dunlap

    Don Dunlap Guest

    The car is so new that I have not even thought to check the transmission
    level. I 'assume' that the service dept. at the dealer checked it when I
    brought it in. I'll check it now though.
    I check the tire pressure every week. No problems there.
    The shudder doesn't occur at any set RPM. If I am accelerating heavily, the
    RPM is naturally high and under normal driving conditions, the RPM varies.
    The shudder takes place regardless of RPM. I have tried giving it more gas
    at the time of the shudder and it makes it worse. Giving it less, it drops
    back to second.

    It is a mystery!!

    Don Dunlap, Feb 8, 2006
  4. Don Dunlap


    Apr 16, 2019
    Likes Received:
    Hi, I was reading your question, I have the same problem in my tribeca.
    do you find any answer to this problem?
    thank you
    tony1870, Apr 16, 2019
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.