Date:         Mon, 26 Jun 2006 20:27:42 -0400
Reply-To:     Sudhir Desai <sudhir.desai@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Sudhir Desai <sudhir.desai@GMAIL.COM>
Subject:      Re: Sheared CV joints
Comments: To: Terry Tan <terryt_97@yahoo.com>
In-Reply-To:  <20060626173735.37675.qmail@web38807.mail.mud.yahoo.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

basically, you have a 30lb tire/wheel rotating at however many rpms it
rotates at highway speed. you have a good sized mass moment of
inertia. Then, something binds in the transmission, or other driveline
feature and causes the rather small rotating inertia of the
axle/cv/whatnot to go up against the relatively huge rotating inertia
of the wheel/tire combo (which is still being accelerated by the
ground seeing as it is in constant contact).  If the binding is small,
you might not even feel it until the axle succumbs to plastic
deformation having undergone one of those cyclic tests like ikea used
to advertise for their chairs and snaps.f
Hopefully that explained it better. I haven't thought about physics
much since I dropped out of engineering school for computers.
Sudhir

On 6/26/06, Terry Tan <terryt_97@yahoo.com> wrote:
> I had posted several times about the rear wheels locking up on
> accelerated reverse with no response from anyone.
> Your sheared CVs may be a related matter.  When the gears lockup
> the inertia from the movement creates a strain on the CVs and
> eventually the axles get sheared. This is just a hypothesis.
> Your lockup may be so slight that you may not feel or notice it.
> It is similar to trying to drive the vehicle with binding
> brakes. The engine torque is twistng the axle which is
> experiencing heavier than normal load.
> Anyone care to comment ?
>
> Terry
>
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