Cameron, I think the reason for the clunk is either a lower motor mount or a strut arm? It happens when taking off from a dead stop with high acceleration. It does not do it if I start off slowly. I had the hood up and you can clearly see the engine lifting with the torque. My son took a pic of the piece that is cracked. That's why I am looking for a diagram, so I can identify the right part for the part store.