I have an 04 fx4 screw with the power rear slider option. It seems to work when it wants too. I had the problem when I just got it and when I took it in, it worked fine and continued to till last week when I REALLY needed it. I was picking up 12 foot 2x4's from HD and needed to slide them through. IT DIDN'T WORK! I had to go all the way home and get my other truck and pick the stuff up then. I tried it 2 days later and it worked! What the **** is going on? Anyone else have this issue?