Front - Rear Torque Bias

[Louis-Alain RICHARD]

I must add:

If driving on a dry road where no slippage, obviously each axle will see 50%
of the engine torque. That's because each axle is dependant of the other one
for its share of torque. 

So I think there is 3 answers possible:

50-50 on a straight dry road (diff locked or not).
0-0 if an axle is up in the air and the center diff is unlocked (resulting
in no car movement)
0-100 same situation but with diff locked (car will move no matter what
happens on the unloaded axle).

Hope I did not confused things...

LA


-----Message d'origine-----

I'm just going from recall in what I saw from some Audi sales 
literature.  My experience from ice trials with the 4Q tends to make me 
confirm the change to 50-50 with the center diff locked.  Would have to 
go thru all the old Audi sales literature that I have to backup my memory

Greg Galinsky


Doug Johnson wrote:
> Greg,
> 
> Actually, with a differential locked, even though the wheels turn at the
> same speed, the torque is far not "controlled" by the differential.  It's
> dependant upon the friction between the tire and the ground.
> 
> Again, one tire on ice and the other on high-friction surface, and BECAUSE
> the wheels are rotating at the same speed, and BECAUSE the resistance that
> each feels to its rotation, the torque being transmitted to each of these
> wheels is far different.  It's dependant upon the friction between the
tire
> and the surface that's acting against (the ground).  The best way to
> visualize the difference in torque, is to think of how much force each of
> these two axles "feels" in this situation.  I hope it's clear that, even
> though the tires turn at the same speed, very little torque (force) is
being
> transmitted through the axle to the tire sitting on the ice.
> 
> HTH,
> 
>  ~ Doug