RE: vc vs awd

["Dave Eaton" <Dave.Eaton@clear.net.nz>]

scott, as orin has said, it appears that we are talking on opposite ends of
the vc issue. quelle surprise...

to summarise (for the archives):

1) it is impossible for a vc to transmit torque without slip.

2) in a centre application, it matters not whether you put a centre
differential in front of a vc or not, you still won't get torque transfer
wihtout slip.

3) in the arrangement above, the haldex acts as a smarter vc.

4) if however, you connect a vc to *both* sides of a centre differential,
then the vc will act in allow interaxle slip while transferring drive to
both output shafts.  this is a true (albeit complicated) full-time awd
arrangement with a centre vc.

dave
'95 rs2
'90 ur-q
'88 mb 2.3-16

-----Original Message-----

Date: Thu, 23 Sep 1999 23:06:37 EDT
From: QSHIPQ@aol.com
Subject: RE: VC vs AWD

[snip]

>you should know that a vc does not start to lock *until* slip has occurred.

*Absolutely*, *positively* correct

>therefore, in the normal mode (equal traction, no turns), there is *no*
>slip, *no* vc lock, and ipso facto *no* drive through the vc.  that equals
>2wd.  when slip occurs (cornering for instance), then you have 4wd.

Incorrect.  I am NOT speaking of a VC center differential, you are above.
You are missing a huge concept here, Dave.  I'm smiling at the thought.
Let's forget the torsen for now, it's roiling water under the bridge.  You
*now* also misunderstand the difference between a center Viscous Coupling
diff and a center Viscous Coupling Differential Lock.