Yeah, usually you have to go out of your way to mount them upside down.
The normal position for the rear shocks is body on top.

The rear Bilsteins 5100s go body up, so there you have proof that it is shock dependent.

 

Thanks for the info. Also what is the difference between progressive and digressive when it comes to shocks?

 

On progressive shocks the damping rate increases as the shaft speed increases up to the point where the shaft movement cannot be accelerated no matter how much force is applied.

On digressive shocks the damping increases but at a decreasing rate as the shaft speed increases.

There are also linear shocks where the damping rate increases linearly as the shaft speed increases.

The type of damping is controlled by the valving and the piston design.

 

Makes sense, so which is generally smoother/softer ride? Digressive or progressive?