Date: Thu, 7 Oct 2004 11:25:47 -0400
Reply-To: vw4x4@FYI.NET
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Eric Zeno <vw4x4@FYI.NET>
Subject: Re: [syncro.org] bad vibes
In-Reply-To: <00a001c4ac7f$cd2d5220$0100a8c0@OnWord>
Content-Type: text/plain; charset=us-ascii; format=flowed
Dave,
What causes the VVC is, gear oil leaks into it.
These don't mix. Therefore any time you stop moving one is
heavier than the other and they seperate. Now one side of the
VVC is weighted, causing your vibration. Letting them sit
for any length of time (about 2 months) and you'll really feel it.
Drive for a time and it gets less but then never goes away.
Eric
David Devere wrote:
>Eric,
> I can't see how draining the fluid from the VC would do anything other
>than make your VC completely bind. The removal of the drive shaft should
>have stopped the VC from working, and thus eliminated it from your test.
>You could open the front trans and remove the VC completely. I've never
>done it but I think Tom Carrington has or had a description of replacing a
>VC on his website and it didn't look to overly difficult. With a completely
>drained front trans and no VC you should have eliminated those components
>from your test. However I don't think the VC is your source of vibration.
>What about front bushings, tie rods, ball joints, front cv's, there is allot
>to make vibrate. Just on a side note. When I first got my van my VC was
>binding a little when cranked all the way to the left or right. I replaced
>the oil in the front trans and the binding went away. I'm no professional
>mechanic just a guy working in the dirt fixing my van.
>
>My best -David Devere
> 87 Syncro Westy
> 2 Harbors MN
>
>----- Original Message -----
>From: "Eric Zeno" <vw4x4@FYI.NET>
>To: <vanagon@GERRY.VANAGON.COM>
>Sent: Thursday, October 07, 2004 9:01 AM
>Subject: Re: [syncro.org] bad vibes
>
>
>
>
>>I'm having a similar problem, but I've removed the drive shaft and no
>>change.
>>After several sets of tire swaps, and greasing the CV joints I've come
>>to the
>>conclusion that I have a VVC, ( vibrating viscous coupling). Moines are
>>flowing faster out than in these days, so replacement is not going to
>>happen any time soon. My VVC has been overly aggressive for years
>>now, and my fix for this was a de-coupler. Now I'm thinking, that
>>I should drain the fluid out of the VVC to see if the fluid is what is
>>causing
>>the out of balance. Comments?
>> ERic
>>
>>
>>
>>
>>Smith, Tim (BNB/ENB) wrote:
>>
>>
>>
>>>occurs between 75 & 85 kph... it's not terribly bad and I try to avoid
>>>that range, only passing through to 90/95... should I live with it
>>>until it gets worse or would you have it addressed now?... thanks
>>>
>>>You're going to need a shaft soon. Crawl under and see if someone has
>>>Already replaced the U-joints with ones with a grease fitting, the OEM
>>>Ones aren't greasable. Go to vanagon.com or syncro.org and read the
>>>Abundant stuuf on DIY U-joint replacement, alternative shafts, etc.
>>>Tim
>>>
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