imager993

Advantages, disadvantages and differences?

JohnLZ7W

The Subaru system is more like the Tosen in terms of it always delivering power to both axles. It's less of a reactive system in that regard.
Implementation wise I think the Subaru system uses a viscous coupling, Haldex is a multi-plate wet clutch.
The upside to the multi-plate clutch setup is it's behavior can be modified via programming, I don't think the purely mechanical systems like Torsen or a viscous coupling can do that.

imager993

Doesn't Subaru have a way to change the front rear split ratio?

JohnLZ7W

I can't remember if it's the Evo or STI that has that capability, maybe both?

JustJeff

Audi Torsen=Full time mechanical AWD, 50/50 split. Haldex is electronically engaged, 80/20

JohnLZ7W

haldex is also mechanically engaged

petervan

both have a switch that adjusts the split

imager993

wish we had that

PracTTical

doesnt it go up to 50/50 when needed?

Audiboy

Unless you get a race controller. Then for normal driving, it is 100:0 (aka Front wheel drive)