4WD noise from front end ,2000 Subaru outback wagon

Discussion in 'Subaru Outback' started by fotoman, Mar 1, 2007.

  1. fotoman

    fotoman Guest

    hi:
    i got super snow tires on all four wheels....and now on bare pavement
    I get vibration from front end when turning corners at slow
    speeds. ....would this be because of the sticky tires? or do I have to
    grease,oil something in the transmission 4WD ???
    thanks
    Rod
     
    fotoman, Mar 1, 2007
    #1
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  2. fotoman

    Todd H. Guest

    Vibration... any clicking? Check the integrity of the rubber CV
    boots and make sure they're not cracked open if you're hearing any
    clicking.

    For vibration... I'd have your wheel bearings looking at for
    starters. ANd that car is also old enough that some of the suspension
    components are perhaps due for replacement? The tires may be
    complicit in this but given the age of the vehicle, I don't know that
    I'd bet o nthem as the root cause.
     
    Todd H., Mar 1, 2007
    #2
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  3. Do you mostly HEAR a noise or FEEL a 'jerkiness'/'binding'?

    Possibly torque bind.

    What was wrong with the old tires? Were you driving with a 'donut spare'
    or different sized tires? Are the new super snows all the same size?

    Carl
     
    Carl 1 Lucky Texan, Mar 1, 2007
    #3
  4. fotoman

    Yousuf Khan Guest

    In general, snow tires produce a lot of noise on dry pavement due to the
    aggressive and deep grooves. The rubber rumbles because the deep grooves
    allow it to squirm around more. If you hear more noise while taking slow
    corners, then it's likely that you're hearing a cacophony of different
    tires noises, where the inner tires travel slower and the other tires
    travel faster around the apex.

    However, if you can also feel a vibration through the steering during
    this time, then it's a mechanical problem, not a tire problem.

    Yousuf Khan
     
    Yousuf Khan, Mar 1, 2007
    #4
  5. fotoman

    fotoman Guest

    thanks for al the replies...I hear and feel vibration , just when
    turning at very slow speed on dry pavement.
    this did not happen until the pavement was dry. and it did not happen
    with my all season regular tire.
    probably a mechanical problem, and was thinking it might be the 4WD
    system...
    I don't drive it much (its a second car), so wonder also if its a
    liquid ,hydraulic type of problem??..
    thanks
    Rod
     
    fotoman, Mar 2, 2007
    #5
  6. I didn't catch if your car is stick or auto. If auto, under the hood
    will be a fuse box. One position in the box will accept a spare fuse
    (15A IIRC) and placing the fuse there should force the Duty Solenoid C
    to place the tranny in front wheel drive (FWD). If the vibration during
    dry pavement, tight, slow turns is eliminated, that is 'usually'
    diagnostic of an internal transmission problem. A few people have
    reported that multiple drain/refill/drive cycles OR a full 'power flush'
    have cured the problem. The solenoid's wiring might be damaged but most
    people need the tranny repaired/replaced.

    Confirm that the tires are all the same size and manufactirer/model AND
    that they have proper air pressure as outline in the manual or on the
    door pillar. Different sized tires can trigger engagement of the AWD
    because an undersized tire is detected as slippage.

    Carl
     
    Carl 1 Lucky Texan, Mar 2, 2007
    #6
  7. fotoman

    fotoman Guest

    wow thats a wealth of information, thanks Carl.
    will check it out....
    got a snow storm today, and car drove perfectly, went into AWD as soon
    as it got slippery etc..
    will check the solenoid fuse when it dries up again.
    ....i assume the drain/refill/drive cycles means transmission fluid
    servicing.
    thanks
    Rod
     
    fotoman, Mar 2, 2007
    #7
  8. Yes, a few folks have fixed 'torque bind' with fluid change(s). The DIY
    approach is to drain and replace fluid 2-3 times(since most home
    mechanics cannot drain the torque converter, a few cycles of draining
    will be required to really assure mostly fresh fluid), driving a few
    days in between, hoping to dissovle gummy depostits on the solenoid
    seat/valves I guess. A 'power flush' is best done by a shop and actually
    replaces all the fluid.

    You may want to search 'torque bind' here and/or at www.ultimatesubaru.org

    Carl
     
    Carl 1 Lucky Texan, Mar 3, 2007
    #8
  9. fotoman

    fotoman Guest

    Carl:
    I sure it was 'torque bind', but car had been sitting for three weeks
    in subzero temperatures.
    fluid might have been cold??...it has since snowed, and I gave the car
    a good run in the snow, and
    could hear when the 4WD kicked in as I was giving it a
    run...intentionally causing slippage so as to
    activate the 4WD. Anyway, the car is running perfectly again now...I
    will replace the fluid anyway!
    Rod
    thanks for the further info and website too.
     
    fotoman, Mar 4, 2007
    #9
  10. fotoman

    burdock Guest

    I have a 1996 Outback and as far as the fuse under the hood, I went so
    far as to connect a switch to it and make it so I can run in 2wd or
    4wd when ever I want, because we were having a problem with the torque
    windup and our local Subaru Dealer gave us a pint of Mopar limited
    slip additive to give it a try and it worked no more torque windup
    anyone having the problem before doing anything else, I would try this
    it took care of the problem, before I got out of the driveway and has
    still fixed it after 10,000 miles and my brother in laws had the same
    problem and his was fixed also, will save some money if it works for
    ya

     
    burdock, Mar 14, 2007
    #10
  11. fotoman

    DS Guest

    I just don't understand you people. "burdock" seems to be the only one in
    this thread that has a clue about AWD. The rest of you keep saying "I can
    feel it kick into 4WD". This makes no sense. You bought an AWD Subaru. AWD
    means All Wheel Drive. aka Full Time 4WD. It doesn't kick in or out. It's on
    all the time. Some AT models allow you to install a fuse (or a switch) to
    defeat AWD, but the rest are always driving front and rear, period.
    DS

     
    DS, Mar 14, 2007
    #11
  12. fotoman

    nobody > Guest

    It's apparent that you've never driven a Soobie in snow or other "less
    than tractionally optimum conditions".

    Yes, there's a percentage of power going to all 4 wheels at all times ,
    the amount depends on the AWD system and the conditions.

    There's a very noticeable (and usually audible) change when a large
    amount of power is routed to the rear in the older 90/10 system. That's
    what most people mean by "kicked in". I haven't driven a 50/50 or VDC
    equipped Soob, so I can't say how those act.
     
    nobody >, Mar 14, 2007
    #12
  13. fotoman

    DS Guest

    Uh, I live in Winnipeg - my Outback has been through heavy snow and major
    ice many, many, many times. In fact, from November to April, we typically
    have snow and/or ice on our roads. Mine is a 98 5speed and thus 50/50
    default biased. There is never any audible change. Same thing in my previous
    Talon AWD (basically the same system but with a rear LSD). Also, same thing
    in my friend's Audi A4, my dad's VW Passat 4-Motion, my step-mother's Volvo
    XC70 and my coworker's WRX. I have driven older automatic Foresters and
    Legacy's through snow and ice and I have never noticed any "change" when the
    AWD system varies its torque distribution. The vehicle typically just
    hunkers down and goes. Even on sheer ice, wheels spin, wheels grab and you
    go.

    I would suggest that anyone noticing a audible change should have their car
    checked because this does not seem right. It should be invisible to the
    driver except for extra traction.

    DS
     
    DS, Mar 16, 2007
    #13
  14. fotoman

    nobody > Guest

    You and I must be talking about two different things. Yesterday, I made
    a "heavy throttle" entry into traffic (left turn). I got some wheel spin
    and felt/heard "some kind of action" going on as power went to the rear.
    Sort of a "soft thud" and the feeling that something was going on in the
    center differential.

    I've had the same when playing in the snow with the same "heavy
    throttle" action on my '00 Outback, my wife's '97 Outback Sport, and (in
    heavy rain) on two '96-'03 era Soobs I test drove before buying the '00.
    I doubt that all four of these have a problem.
     
    nobody >, Mar 16, 2007
    #14
  15. fotoman

    Blair Baucom Guest

    On the Saturn Vue automatic with AWD, the fronts spin, then a few seconds
    later a loud thunk and the rears launch you. Did not feel or sound good. My
    2005 Forester XS with manual transmission, Limited slip rear, never seems to
    spin, and on snow and ice, all the wheels seem to break loose under hard
    acceleration. I never feel or hear the system working. It just works great.
    Not sure how quick the 4EAT can transfer power though.

    Blair
     
    Blair Baucom, Mar 17, 2007
    #15
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