I was at the Toyota dealership today waiting for oil change, so I decided to check out the new 4Runners. I opened the tailgate and noticed how easy it was to close down. It seems like my tailgate takes a good pull just to close it. The new tailgate is effortless. So, I'm wondering if maybe there is a leak in hydraulic which I didn't see, but the part says it's 'gas filled' or maybe its just old and needs replaced? I can't remember if my tailgate took much effort when I bought it new. I see some bolts that hold it in place so replacement might be a breeze?