Judder on gear change

2011 Ford Fiesta 1.6 tdci titanium
Car: Ford Fiesta
Year: 2011
Variant: 1.6 tdci titanium
Categories: Running Rough, Starting & Power Loss
Hey people :) so I purchased my car about 4 weeks ago and it's got me and the dealer scratching our heads. It's intermittent to say the least, but here goes

When I'm changing from 2-3 or 3-4 occasionally the car judders. Now, normally the cars smooth as silk and when I purposely make the worst L plate gear change to try and recreate the problem it still changes beautifully!

Just now and then, you'll lift your foot off the clutch and you get thrown forward, it's that severe.

Diagnostics have shown nothing so they're having the car next week till its fixed but just wondered if anyone else has this problem? Or any ideas to what it is? It's only done 23k!!
Problem added: Jun 2, 2013 (10 years ago)
Could check engin mountings, though you should normally get the symptoms all the time if it was that.
Answered Jun 3, 2013 (10 years ago)
1.6 diesel will have a dual mass flywheel car has done low mileage but i would get it checked out
Answered Jun 4, 2013 (10 years ago)
Yes I'm thinking its the dual mass flywheel too, ford have been test driving it for a couple of days now and still can't find the fault, if it was a problem with the mass flywheel would it show up on diagnostics?
Answered Jun 5, 2013 (10 years ago)
no will not show up on diagnostic check if it has started to break up will be able to tell if starter is removed
Answered Jun 6, 2013 (10 years ago)

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