My 03 Grand Caravan AWD has a problem with the AWD. The rear wheels never kick in -this worked fine last winter - I just noticed the problem because of the show we just got - the problem may have been around for quite a while without my noticing it. It essentially acts like a front wheel drive van now - terrible in the snow. Any advice would be appreciated. It still has the 7/70K powertrain warranty in effect - Hopefully it would be covered if I have to bring it in.