Unity 5 physics change from Unity 4

Hi, I upgraded my project from unity 4.6 to unity 5 and the physics have completely changed (see attached picture) I cant work out why or how to get them back to working in the way they did in Unity 4.

Its just a simple box collider sliding along a terrain with both physical materials having very little friction.

Any help would be appreciated.

Thanks in advance!

 

Turns out it was an animation issue.