Quote:
Originally Posted by luggsey
I can't see what these guys are trying to do?
If both front wheels are spinning on rollers then the 4wd will no engage so what are they proving?
Manual 4wd like a land-rover would always have drive to both axels so would drive over the rollers but what does it prove?
|
The haldex system on Volvos is linked to traction control and if both front wheels are spinning but the rears are stationary it will send power to the rear. Also on the newer cars with the 5th gen system (new XC90, v90 etc) power is always sent to the rear when setting off from rest.
It gets tricky when one wheel on an axle is spinning as it will then rely on the traction control system to apply the brakes to the spinning wheel thus sending power to the stationary one.