Tire Size w/ AWD welded center diff?

[GSixxer]

Alright, I KNOW what everyone has said about swapping tires with an AWD and I have read through quite a few pages but I havent found an answer to my specific question yet.

Long story short, I want my 17's from my GS-T I'm selling to my AWD but I have about 50-75% tread left on my front tires while my rears have about 90%. The reason my situation is different is because I have a welded center diff, does this mean that the tire size difference won't matter as much? Also if I was to switch the rims/tires out should I put the 2 front tires on one side of the AWD or match them up front to back? Will I still burn my VC if my center diff is welded(or do I even still have one in there ) ?

 

[TunaTalon]

Different size tires on an AWD cause the viscous coupling to fail because it has to continuously slip to keep the tires from slipping. With a welded center differential the tires will slip continuously as one pair will be trying to go a different speed from the other.

If you put the larger tires on the right side your car should be very good at making left turns.

 

[pballer]

No matter where you put the tires, your gonna get Driveline wind-up. If you put a bigger tire on one side, then you are gonna be constantly turning the pinion gears in the front and rear diff and eventually overheat them. I would not recomend it, however it is up to your descresion weather there close enough to put on or not. You can get away with a little difference.