I've read that the viscous coupling/center differential usually fail around 150,000 miles. Are these common failures? I can't get a good answer from the Forester forum (yet).
And what exactly causes them to fail other than mismatched tires? Does the fluid shear to the point that it can't transfer power as effectively?
And what exactly causes them to fail other than mismatched tires? Does the fluid shear to the point that it can't transfer power as effectively?