Sterling - I don't know about the '06, but I have had the same experience on my '05 4.4. Most of the time it is very slight. A couple of times it was so bad I thought someone rear ended me. Anyone know what the software fix is supposed to be. I'm going in for my first service within the next few weeks. Other than this and a window regulator, I've had 13,000 problem free miles. I love my X! Power is great, an improvement over my 01' 4.4. I figured it was time I said hi all, I've only been a member for months! Thanks in advance
Laura