That's correct, because SH-AWD is a sport oriented AWD which helps you to corner better thru rear torque vectoring. You won't need a center differential unless traveling in deep snow. For normal winter conditions SH-AWD is one of the best systems available. The main
disadvantage of SH-AWD is that toque vectoring only works
under acceleration (unlike torque vectoring in X5m/X6m/F15 w/ DHP which will work under braking). Most drivers will apply brakes in the slippery curve which will disable toque vectoring.
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Originally Posted by AtlasM
That's not exactly correct.
Acura SH-AWD does torque vectoring on the rear axle. It does not do torque vectoring on the front axle. So it can send the majority of the power going to the rear wheels to one side or the other, but not all the wheels.
SH-AWD also doesn't have a center differential. It has a power takeoff unit from the transaxle. It's up to the computer to decide when the PTU sends power to the rear wheels, and sometimes it's not sending any power to the rears.
I live in Wisconsin, and based on my experience with several different types of awd/4wd vehicles, really what helps when the snow gets deep is having a real center differential where by default the car sends power to both front and rear axles, and is varying the split depending on available traction. The only way to get through the deep snow is to have both front & rear wheels churning.
Being able to move power side to side across an axle is nice, but it's not a substitute for a center diff.
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