I'm got my 2012 FG booked in next week for similar issues, when I drop the clutch I get massive clunks, traction control off same deal. Feels like the rear wheels are bouncing and not spinning, Ford dealer looked at me like I was mad when I explained it. Was this the same issue you had? I'm finding it hard to get any info as the mech's at my local ford have a combined age of 14....,