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Date:         Thu, 26 May 2016 09:55:59 -0400
Reply-To:     Marc Perdue <mcperdue@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Marc Perdue <mcperdue@GMAIL.COM>
Subject:      Re: Rear-wheel clunk (possibly) identified
Comments: To: Vincent Dow <ianvincentdow@gmail.com>
In-Reply-To:  <CAF9Ro-Yzq2-3y3eFFTNaB+vYAB9DaRqKdhnB87k=OYa+auVS-A@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8

Be sure the axle bolts are tight. Mine was making this knocking sound for about 400 miles till it didn't, at 10 PM, during a snowstorm. That's when the bolts all gave out and the axles wouldn't turn any more.

Marc Perdue

On Wed, May 25, 2016 at 11:10 PM, Vincent Dow <ianvincentdow@gmail.com> wrote: > I need to lie down under her again and try to yank that axle outwards, as > if to bang it on the hub - listen for a simlilar *instrument* as makes my > 's van's clunk sound climbing hills. > For an axle to make the sound my rear is making, it would have to be going > in and out each revolution. Or, maybe the trailing arm is swinging > in-and-out by revolution - creating a hammer effect > There doesn't seem to be anything the axle could be KNOCKING as it spins - > that just doesn't make sense. > > Interestingly, just replaced my tires - the wear was so uneven on my rears > . I had a patch one third the passenger side rear that was baby-ass bald, > but there was still tread on its opposite side. Got me thinking bent-axle. > > My Klunk sound seems to go away at highway speed. It's only under load, > cycling up through 1st and 2nd gears. The harder I push, the louder it is. > > On Wed, 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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