I used to have a CJ-7, pretty old and beat up.

The reason your jeep wobbles is because it doesn't have a differential in
the front.  The inside wheel should be moving less than the outside, but it
doesn't, so they fight.  When one tire slips a bit the jeep 'wobbles'.  It's
not the CV joint per se, it's the lack of the differential.  A CV joint
would have the same problem.  All wheel drive units have three
differentials.

For Christoph, 'CV' joint means "Constant Velocity Joint".

== John ==

"Michael McKnight" <nes### [at] hotmailcom> wrote in message
news:3c1f7b47@news.povray.org...
>
> > I think this is a very good demonstration for the fact that this kind of
> > joint does not lead to constant angular velocities on both sides.
> >
> > Christoph
>
> You know, that's interesting - when i was testing the animation, i had
> accidentally rotated the axle the wrong way, and when it hit about 90
> degrees relative to the other, it pretty much stopped.  Looking at the one
i
> posted,  i can see how the angular velocity becomes more erratic as the
> angle between the two axles gets farther away from 180 degrees.  This is
> really interesting because the front wheels on my old jeep are connected
to
> the font axle by U joints, and it's an all wheel drive.  Maybe that
explains
> the funny wobbling motion it makes on really tight turns.  I wonder if CV
> joints would have constant angular velocities on both sides, and that's
why
> they are used now?
>
> michael
>
>
>

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