On other forums I always see people scream about replacing all 4 tires on an AWD car, and keeping them rotated all the time, or the Dif will die in 2 months.
I'm just not seeing it, I could understand if all 4 wheels were being driven all the time, but as far as I know Subarus are 2wd until the main wheels slip, then it powers other wheels with traction.
Also wouldn't AWD systems be designed to take care of the 1-2 inches of differential between the circumference of the tires. I could understand this not being worked out 25 years ago, or with something like a donut spare (2wd fuse). But not with same sized tires