Torsen w/o prop shaft

[Dave]

nope, your car won't move an inch.

this is the reason that audi put a locking rear diff on the gen 2 cars
(i.e. the first torsen cars) - in order to drive torque into the torsen
from the low-torque side of the diff to enable the high traction side to
work. audi removed the locking rear diff for the gen 4 quattro cars (to
avoid the law on unintended consequences) and replaced with edl (using the
abs system to brake a spinning wheel), but the reason was the same. in a
gen 2 car without the rear diff locked, is was enough to put a wheel in
the air, and the car wouldn't move with power applied.  in fact even if
the rear diff was locked, as long as the wheel in the air was in the
front, it wouldn't move either.

however, with the gen 5 cars (b7, c6, d3), the torsen type "t3" is used.
this has an epicyclic diff in front of it which means that the torque
split is real, not nominal like in the earlier torsen cars. and the car
will move without the wheels being on the ground and edl being active.
ditto the gen 6 cars with the non-torsen crown-wheel diff.  they also have
the option of a torque vectoring rear diff.

your [d2] a8q is a gen 4 car with edl.  of course, due to the lack of a
prop shaft, edl isn't going to help...

dave
'08 rs6 avant
'04 allroad tdi


On 28/07/11 11:45 PM, "Grant Lenahan" <glenahan at vfemail.net> wrote:

>that is my presumption, but i believe that a the other side will spin, it
>may get hot - not good for any significant time.
>
>Grant
>On Jul 28, 2011, at 1:14 AM, Paul Caouette wrote:
>
>> I hope you try to move it.....my logic says since the torson would
>>consider
>> the shaft spinning as "no traction" to the rear it would transfer
>>torque to
>> the front....
>> 
>> paul from my droid
>> On Jul 27, 2011 9:13 PM, "Dave" <dave.eaton at clear.net.nz> wrote:
>>> nope - won't move a foot. the torsen diverts torque from the output
>>>shaft
>>> with the least traction to the one with the most. in your case as this
>>> shaft has 0, nada, traction, there is none to apportion. so no
>>>movement.
>>> the torsen is very like a lsd in this regard.
>>> 
>>> propshaft out, you need to tow it. flatbed highly desirable.
>>> 
>>> 
>>> Dave
>>> '08 rs6 avant
>>> '04 allroad tdi
>>> 
>>> On 28/07/11 1:08 PM, "Cody Forbes" <cody at 5000tq.com> wrote:
>>> 
>>>> ------------------------------
>>>> 
>>>> Date: Wed, 27 Jul 2011 18:18:46 -0400
>>>> From: "Cody Forbes" <cody at 5000tq.com>
>>>> 
>>>> I've got the prop shaft out of my A8q. How does a Torsen car behave
>>>> without it? I'm planning to move the car a couple hundred feet into a
>>>> different parking space, but was wondering about driving it ~20 miles
>>>> home.
>>>> 
>>>> -Cody
>>>> 
>>> 
>>> 
>>> _______________________________________________