check the a/roll bar links and also have a look at the a/roll bar inner mounting bushes on the front beam,usually if they are knocking then they will be worn and you will be able to see daylight between them and the bar
cdc
August 2012
I can answer this question...
transit connect knocking noise while hitting bumps?
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix vans.