Disco 4 - Juddering

Hi
i am new to the forum would really appreciate some help.

I have bought a Discovery 4 2010 vehicle has been standing for a while been checked over all seems OK just one issue

At any stage of going up a slight incline at approx 30 mph vehicle shudders/ vibrates when you try to accelerate . (Same feeling as going over cobbles or raised hatched ground)

This is worse if fuel tank is over half full !! Don’t know if that makes a difference

No warning diagnostic display

Fuel filter replaced but still happening

Anybody had similar issues or got any ideas

Many Thanks

Check gearbox oil level.

Tbh it could be loads of things, and will be difficult to diagnose remotely.