Quote:
Originally Posted by oscars2212
it is an part-time, automatic AWD. It is FWD until traction slip is detected, then it shifts torque to the rear axle as needed (up to 50% I think).
I think the generally accepted distinction between 4WD and AWD is that 4WD allows you to select a "low" mode, which is ideal for off road conditions. Other than that, most AWD and 4WD systems today are essentially identical for onroad driving; the differences are seen in whether your drive system is full time or part time.
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I would disagree in that I don't believe a 4WD system allows a variable percentage of power to go to a set of wheels.
Most AWD system allow a variable amount of power to go front or rear wheels and in some systems from side to side were all the power can go to a single wheel. Good luck finding that in a 4WD system.
Essentially a 4WD system is a very crude AWD system once engaged.