Date: Wed, 25 May 2016 22:10:56 -0400
Reply-To: "kimbrennan@mac.com" <kimbrennan@MAC.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: "kimbrennan@mac.com" <kimbrennan@MAC.COM>
Subject: Re: Rear-wheel clunk (possibly) identified
In-Reply-To: <CABToOYJRJj07SkWh=MdWGK9R_Or4GcehLMbYSQbp7a179boE6A@mail.gmail.com>
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Check to make sure the lug nuts are tight.
Sent from my iPad
> On May 25, 2016, at 10:04 PM, Edward Maglott <emaglott3@GMAIL.COM> wrote:
>
> The clunking sound I have is exactly related to wheel speed. It sort of
> fades in and stays a couple dozen seconds or a minute then fades out. I'm
> pretty sure I've tried swerving and that didn't affect it. Also pretty
> sure going around a curve either way did not affect it. If it is the
> driveshaft end hitting the inside of the hub, why would it do that once per
> revolution and only sometimes? The place I have had it happen more than
> once is a long, strait mountain grade on Interstate where I'm at WOT for
> quite a number of minutes and often have to put my AT in "2" for a while
> too.
> Edward
>
>
> On Wed, May 25, 2016 at 8:44 PM, Vincent Dow <ianvincentdow@gmail.com>
> wrote:
>
>> That's great to learn greg. Thank you.
>>
>> The thread on samba zeroed in on the theory that the axle itself was moving
>> between the CV joints. Because it's only held on by circlips. So the longer
>> end slides and bangs into the hub.- or it could be dinging the output on
>> the transaxle.
>>
>> There is a thrust washer which originally was supposed to slip on the axle
>> before the circle, and that would limit the movement of the axle between
>> CVs. But it was said to be a PITA to get the circle on with it there. The
>> Cvs from van cafe still show the thrust washer in their kit. But many don't
>> use it.
>>
>> The other possible solution is to slide the CV boot as far towards the
>> wheel as possible, and that will hold the axle inboard.
>>
>> I'm going to check my trailing arm bushings tomorrow as well.
>> best
>> vinnie
>>
>>> On Wed, May 25, 2016 at 8:38 PM, KI4TLF <ki4tlf@gmail.com> wrote:
>>>
>>> Mine had rear swing arm bushing going bad, specially the left side.
>> After
>>> turning to the right at speed, 25+ MPH, I'd get the clunking going over
>>> bumps until I turned left at those speeds or higher again.
>>> What was happening was the lower swing arm would shift inboard, then the
>>> end of the axle would clunk over bumps. Once I turned right, it would
>>> shift out, then no more clunking.
>>> Replaced both lower swing arms bushing and no more problems turning
>> either
>>> way. :-)
>>>
>>> It took several months to find it driving it daily. Finally found out
>>> what was happen after the CV boot tore and I went to replace it. Found
>> the
>>> swing arm would move in and out over an inch.
>>>
>>> GregM
>>> '84 GL
>>> 1.9l 4-speed
>>>
>>> -----Original Message-----
>>> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
>>> Of Vincent Dow
>>> Sent: Wednesday, May 25, 2016 4:54 PM
>>> To: vanagon@GERRY.VANAGON.COM
>>> Subject: Re: Rear-wheel clunk (possibly) identified
>>>
>>> Stick tranny.
>>> I was just under there again, videoing the chamber of the trailing-arm,
>>> occupied by the outboard CV joint.
>>> Looking for something that could be striking.
>>>
>>> The Bentley manual doesn't show any washers, thrust washers... any of
>> that
>>> stuff being mentioned in the samba thread.
>>>
>>> I'm going to keep reading, thinking. Tomorrow it goes on a lift so at
>>> least can inspect the CV and grease.
>>>
>>>> On Wed, May 25, 2016 at 5:22 PM, Dan Lamb <vanagongramps@gmail.com>
>>> wrote:
>>>
>>>> Auto or stick tranny? Axle lengths are different left and right on
>> auto.
>>>> Someone may have used stick axles or swapped sides? Ones too long?
>>>>
>>>> Dan Lamb
>>>>
>>>>>> On May 25, 2016, at 12:34 PM, Edward Maglott <emaglott3@GMAIL.COM>
>>>>> wrote:
>>>>>
>>>>> I have puzzled over the same clunk in my '86 for years. It is on
>>>>> the passenger side though. It is quite a heavy sound and feeling.
>>>>> not like anything I could imagine in the brakes making. I'm not
>>>>> sure mine goes
>>>> away
>>>>> if I swerve to load/unload the suspension. Mine went away for a
>>>>> while after I replaced the outer CV on that side. Maybe couple
>>>>> years/couple thousand miles. I haven't read all the samba article
>>>>> linked but what I have read is interesting. IIRC, it does
>>>>> sound/feel like what happens if you slide the axle in/out.
>>>>> Edward
>>>>>
>>>>> On Wed, May 25, 2016 at 2:01 PM, Vincent Dow
>>>>> <ianvincentdow@gmail.com>
>>>>> wrote:
>>>>>
>>>>>> Since last summer I've been experiencing a puzzling, intermittent
>>>>>> clunk from the driver's side rear.
>>>>>>
>>>>>> I had the rear brakes serviced by a shop in L.A. There were a bunch
>>>>>> of issues with that, but one of them was a very audible TOCK TOCK
>>>>>> TOCK TOCK sound... the frequency of which corresponded to wheel
>> speed.
>>>>>>
>>>>>> I only heard this sound when the van was warmed up from highway
>>> driving.
>>>>>> And then starting from a stop, or climbing a grade.
>>>>>>
>>>>>> My girlfriend came across this thread that deals with exactly what
>>>>>> I
>>>> have:
>>>> http://www.thesamba.com/vw/forum/viewtopic.php?t=387993&postdays=0&pos
>>>> torder=asc&highlight=axle++noise+fit&start=0&sid=cb5f768858f53fec27c75
>>>> 037b66837cf
>>>>>>
>>>>>> Seems to indicate an overlong CV-stub axle... that bunches up (I
>>>>>> guess)
>>>> and
>>>>>> hits the hub. An absence of thrust washer between the hub and the
>>>>>> CV
>>>> might
>>>>>> be the cause.
>>>>>>
>>>>>> Is anyone familiar with the thrust washer as spacer at the CV and
>> hub?
>>>>>> Tomorrow going to bring it up to Carrera motors and put it on the
>>> lift.
>>>> May
>>>>>> just get the CVs greased while I'm at it - I leave cross country on
>>>> friday!
>>>>>>
>>>>>> vinnie
>>
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