The tailgate on my 2006 Titan feels like the dampeners have worn out. It dampens the fall for the first 6 inches or so, then it seems like they just give out. The result is a pretty loud thud when the tailgate hits the bottom. I know on the new tailgates they are as smooth as glass when opening and closing. Any reason why my tailgate would be doing this? Did they change the tailgate dampening design from 2006 to 2008? I'm thinking about taking it in to the dealership before my 3/36k warranty is up, but I don't want to take it back if that's the way it's supposed to be. Any ideas are much appreciated.