Tranny grinds into 2nd

[Kidd-7]

I have 3 on the tree, not sure wich 1; about 73k miles on it. There is some noise almost like a rattle when the truck idles, its out of gear and the clutch is not pressed. Any input on that would be appreciated, But the real question: every time I shift into 2nd I grind. Downshift or upshift; the only time it doesn't grind is if I am moving, I hold the clutch in and kinda let the tranny slip into 2nd. It seems to come to a point where the gear mate right up.
I'm thinking its the syncros, but I'm no tranny guy.