Date: Wed, 20 Oct 2021 02:25:33 +0000
Reply-To: Richard Koerner <rjkinpb@SBCGLOBAL.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Richard Koerner <rjkinpb@SBCGLOBAL.NET>
Subject: Re: Sound conundrum - input requested
In-Reply-To: <CABToOYLaQ_Cm-1mp-R+-N3D0peM8U9ON=ETy4CeHzAJiJvP18Q@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
Yeah....all of Macho stuff to raise a Vanagon from it's eloquently engineered status? Not a good plan. Sure, it will look cool and be cool. For a while.
On Tuesday, October 19, 2021, 07:08:04 PM PDT, Edward Maglott <emaglott3@gmail.com> wrote:
There's the why the axle is shifting in and out along its length. I never
understood that part of it. That's also why you can't simulate the
condition that occurs even if you deflect the suspension to the max in the
shop. Because it's not under load.
My van would do this climbing mountain grades. Sometimes it would start
out faint and slowly increase in intensity then fade out. If I swerved the
van to cause the suspension to deflect with the body roll the sound did not
change.
Edward
On Tue, Oct 19, 2021, 8:51 PM vw_van_fan_Mark <madvws@cox.net> wrote:
> One of the CVs has a bad wear spot or spots.
> The deep pits occur in the spots where the balls spend the most time.
> The balls dig into the surface of their tracks under under engine load.
> Every time the axle rotates while at an angle the balls move back and
> forth in their groves.
> The greater the angle of the axle the farther the balls have to travel.
> When you lifted the van you increased the travel distance of the balls
> and now they have to move back and forth fully across the old pit(s)
> where they used to spend more time.
> Since they are traveling more distance in the same amount of time they
> are also moving faster.
> When under load the balls are forced firmly against their grooves as
> they follow them.
> When the ball encounters the wear pit it momentarily sticks but then
> abruptly launches out of the pit.
> This action causes the whole axle to jump sideways.
> When the axle rotates but isn't under load the balls just glide over the
> deep wear pits without getting momentarily caught in them.
>
> Mark
>
> Vanagon Man wrote:
> > This all makes sense, especially since I put on the GW lift springs
> recently.
> > Except….
> >
> > Why would it stop make the sound when I take my foot off the accelerator?
> >
> >
>
|