So we got our first reasonable snow here in MN and i was out driving and noticed when my front tires were slipping it didnt feel like my awd was kicking in. My dstc was on so I turned it off and still it didnt feel like there was any pull from my rear wheels. Is there an easy way to tell if they are not working Ex. put it on a lift and put it into gear? Also there are no service lights on my dash. Any ideas from the community??