Got my 16:1 PST box installed last week and I love it. Not overly stiff at all.Way easier to steer then I thought it was going to be. I also had the grease come out. I'm pretty sure it's just a relief valve.
Thanks @347Duster247 and @lead69, that's a relief! I like the 16:1 box a lot too and it's really not a noticeable difference to the 24:1 box I had before. Only that it's not that sloppy, haha.