Car.mad

Hey all
Need some help as I am stumped on this one. I have a knock and you can feel the sound near your foot where the sub frame mount bolt is.

It's a mk3 mondeo

So shocks springs and top mount new
Anti roll bar bush
Drop link
Inner tie rod arm
Track rod end
Bottom engine mount
New drive shafts with cv's etc
Bottom wish bones

So everything is new and everything is rock solid with no play in it but I have this knock?

Doesn't do it over bumps or anything like that only very low speed , like when your in traffic you set off it goes clunk a
Then when you stop it clunks

So I'm really stuck on this one