I just recently purchased my first volvo, its a 2004 volvo s60-r. its supost to be all wheel drive and 300hp. the rear wheel drive part isnt working. it was raining earlier and i gave it some gas to merge into traffic when the front tires where just spinning like crazy. isnt the rear supost to engadge when the front tires spin? also isnt my traction controll supost to help that too? why is nothing working? please help i just bough it for 15k at a dealership and they said sorry cant look at it, its sold as is.