The input and output shafts spin at a constant velocity no matter what the
differential angle between the two because the balls can adjust the axis of
rotation as necessary.

In your old fashioned Jeep with universal joints in the drive path the
output shaft takes on an eccentric fast/slow/fast/slow as the rotation takes
it over the fixed axes of the joint.

Way easier to show than describe - sorry.

On 7/16/07, Mark Hersh <markhersh@msn.com> wrote:
>
> Well, I got me tunes in the back now.  It was a mightly struggle but clean
> (?) living prevailed.  My advice is do NOT try to run an
> electrician's "fish tape" from the underdash area up through the pillar.
> The tape's hook/loop got stuck (I didn't realize the tunnel wasn't
> completely sealed) and I had to remove one side of the headliner paneling
> to unhook the fish tape.  Some thinner wire (which was more flexible than
> a
> fish tape) sufficed, and I was able to run a new right rear speaker
> ground,
> re-mantle the interior, and all is well.
>
> Now onto my first CV joint repack job in many, many years (didn't have a
> VW
> for a while).
>
> Why are they called "constant" velocity joints, anyway?  What is constant
> about the velocity, as they spin at the same varying speeds of the
> transaxle?
>

--
Jake
1984 Vanagon GL
1986 Westy Weekender "Dixie"
www.crescentbeachguitar.com