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  1. #1
    Join Date
    Feb 2013
    Location
    Spokane WA>
    Posts
    4

    Default Viscous Couple Trouble

    My 1998 V70XC AWD, with 201k miles has been making clankity, whirring noise for the last couple of thousand miles. At first it was just in corners, then it became more frequent. Now, it is constant EXCEPT under acceleration. (I had a truck with a bad U-joint that made a similar sound.) A mechanic looked at the front boots and said they were fine and suggested that the viscous couple is going bad. He also said that I can drive it until the noise really bothers me. (It does) That is a bugger and about $3k to replace. Can that be right??? Can this AWD unit be removed and driven safely without damaging the remaining drive system. In essence making this a front-wheel-drive only car? Later when I feel like dropping the 3k into it can it be made whole again? Would it be worth the price to do it now?

  2. #2
    Join Date
    Apr 2003
    Location
    Devon PA
    Posts
    11,409

    Default

    Just remove the propshaft ... 12 bolts
    The Viscous Coupling usually does not go clankity clank if it goes bad (very rare), it's probably either a bad propshaft (common, $1K new or $400 refurbished) or a blown bevel gear ($$$) so just remove it for now and be in FWD (no issues doing this).
    IF, it still makes noise, the bevel gear broke and that's another story
    All emails please use: jrl1194 (at) aol.com

    2007 V70 2.5T White/Oak, 112K miles. My daily driver and GORGEOUS
    2000 V70R wife's. Won't sell, now at 148K miles !! and still (almost) perfect.
    2000 S70 GLT SE with 29,000 miles!!! A time capsule, V70R front bumper, Volans, etc. SOLD!!! (I Will regret selling this!)

  3. #3
    Join Date
    Oct 2007
    Location
    Fairbanks, Alaska
    Posts
    233

    Default

    If you have a mechanic suggesting that you should keep driving
    instead of dealing with the problem, my suggestion would be to
    find anther mechanic.

    Like Jim says, it's pretty easy to pull the drive shaft and go FWD
    for now. That will also make it pretty easy to isolate your problem.

    The DS has a CV at the front that is nearly dead certain to have a
    baked boot, a U-joint in the center and a CV at the rear. There's also
    a carrier bearing in the center supporting the DS in the middle.
    These are the usual failure points to have a closer look at.

    Once you know what needs attention, contact the friendly folks at
    ColoradoDriveshaft.com. They'll fix you up with whatever you need
    for waaaaay less than 3 K.

    '98 " Last of the Good Ones!" V70 R
    Upsolute ECU - E-Codes/SilverStars - ArcticGrade Oil Lines - HD SkidPlate - Spoiler - XC Grill -

  4. #4
    Join Date
    Feb 2013
    Location
    Spokane WA>
    Posts
    4

    Default

    To clarify: I was on a road trip when the noise began and the mechanic who said it would be OK to drive was 1,000 miles from my home. He was assuring me that it would get me home...
    Thanks for the advice. This is my first foray into AWD. I will go at it one thing at a time. HOPEFULLY it is not the bevel gear...

  5. #5
    Join Date
    Apr 2003
    Location
    Devon PA
    Posts
    11,409

    Default

    Let us know what it does after you remove the propshaft
    All emails please use: jrl1194 (at) aol.com

    2007 V70 2.5T White/Oak, 112K miles. My daily driver and GORGEOUS
    2000 V70R wife's. Won't sell, now at 148K miles !! and still (almost) perfect.
    2000 S70 GLT SE with 29,000 miles!!! A time capsule, V70R front bumper, Volans, etc. SOLD!!! (I Will regret selling this!)

  6. #6
    Join Date
    Feb 2013
    Location
    Spokane WA>
    Posts
    4

    Default

    Took out the prop shaft. Noise is GONE! I sourced it to the front end of the prop shaft. Pretty straight forward removal. 6-6mm bolts on the front and 6 at the rear and 2 -12mm bolts that secure the carrier berring. After 200k miles the bolts were a bit stiff but were eventually convinced to let loose...Thank you for all of your help on this. I guess now I will need a new (or refubished) prop shaft if I want to resume the AWD!

  7. #7
    Join Date
    Apr 2003
    Location
    Devon PA
    Posts
    11,409

    Default

    You can buy just the front bearing for $125 from www.coloradodriveshaft.com
    or about $450 for a total rebuild
    All emails please use: jrl1194 (at) aol.com

    2007 V70 2.5T White/Oak, 112K miles. My daily driver and GORGEOUS
    2000 V70R wife's. Won't sell, now at 148K miles !! and still (almost) perfect.
    2000 S70 GLT SE with 29,000 miles!!! A time capsule, V70R front bumper, Volans, etc. SOLD!!! (I Will regret selling this!)

  8. #8
    Join Date
    Oct 2007
    Location
    Fairbanks, Alaska
    Posts
    233

    Default

    Front CV replacement is pretty easy.

    Have your VIN handy along with a
    measurement of the CV's diameter.

    Then get your credit card out and
    and contact Colorado Driveshaft.
    They'll take good care of you.

    '98 " Last of the Good Ones!" V70 R
    Upsolute ECU - E-Codes/SilverStars - ArcticGrade Oil Lines - HD SkidPlate - Spoiler - XC Grill -

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