Thought I would try my luck with the ford forum before dropping a large amount of money into a mechanics pocket.Our expedition has been growling and pulling to the right whenever we push hard on the acclerator while driving.The four wheel drive does not engage but the suv is an awd so I am not sure how this all ties together? I know the awd is working due to driving in heavy mud at times. My A B S light has been on for awhile and I had someone tell me this could be related Due acomputer malfunction? Hopefully someone will read this and have some insight on this .thanks