I have usdm 2005 subaru sti
We put up the car and if spin the rear wheels no connection with front wheels so no spin the front wheels.The rear wheels mak hard spin bud if just spin the front wheels its easy spin.These symptomps the broken center diff and broken front diff or what think about ? My problem with the car if the rear one or two wheel in the air absolutely no move my car.

 

Not sure i understand but rear diff is plated so will be tight, if no noise or clunking then it will be fine

 

I dont hear cluncking or other noises but no move my car if put on the air one wheel.What think about this just electronical problem or else ?

 

Not sure i understand but the diffs wont operate properly with wheels in the air, the centre diff is electronic do you have a flashing dccd light on dash

 

With dccd light all normal no warning light on.