2001 Hymer / Fiat Ducato engine judder in 4th gear

[Bigjr]

I own a 2001 2800 cc Hymer / Fiat Ducato jtd. It recently developed a slipping clutch after 50,000 miles and this was replaced as soon as lockdown permitted by our local garage.
The vehicle now has a pronounced engine judder when under load and being driven 35-40 mph in 4th gear. No problem is apparent at other speeds or gears. The judder goes away if you put your foot on the clutch suggesting that wheel balance is not the problem.
Is it possible that the new clutch is faulty in some way. Or is the judder more likely to be worn driveshaft bearings or engine mounts (though neither of these were giving any trouble before the new clutch was fitted).
I would appreciate any views on this matter before I raise the issue with my garage.

 

[chatteris]

was every bit changed is it a dual mass flywheel

 

[Bigjr]

I'm not sure about what was changed - Not enough technical knowledge to ask at the time. I see the garage invoice has charged me for a "clutch kit" at £151.25 + VAT in the "Materials" section of the invoice if that is any guide as to what was fitted.

 

[Manic]

If clutch has just been changed, I think I would be going back to garage.
Doubt it would be dual mass type clutch.

 

[Jake vE]

A friend of mine has a similar motorhome and has written an article on his website about driveline judder which might offer some advice before taking it back to the garage?

Ducato based Motorhome – fixing judder when pulling away from standstill – Motor-Roam

motor-roam.co.uk