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The FWD fuse under the hood forces the trans to open the transfer clutches. This "turns off" the AWD.
To get a bit more detailed, The transfer clutch(es) are controlled by the Transmission Control Unit (TCU). Using input from the ABS wheel sensors. The TCU varies how much slip the transfer clutch has, based on speed differences between the front & rear wheels.
When the fronts are on, say, ice, and you punch the gas, they start to spin. This sends a signal to the ABS unit, which forwards the signal to the TCU. The TCU then activates the duty "C" solenoid. This closes the clutch, sending power to the rear wheels.
Please note: I've skipped several details in making this easier for non-Soob geeks to understand. ALSO this does NOT apply to the 5MT.
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[SIGPIC]http://www.subaru-svx.net/forum/image.php?type=sigpic&userid=5569&dateline=1207440 507[/SIGPIC] Naught but by the grace of God "42" Current Stable By Age:
'89 Subaru XT6 Silver "Audrey" as in Hepburn
'96 SVX LSi #767 Brilliant Red "Lil Red" Now on the front burner. Looking for a totalled, but running parts car.
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