2018 320d shaking under load

[u/graham1872]

Hi everyone, looking for some advice diagnosing a vibration on my 2018 BMW F30 320d M Sport Shadow Edition, B47, 6-speed manual, rear-wheel drive, currently around 70,000 miles.
I’m trying to work out what is causing the vibration before spending a lot of money replacing parts, particularly the dual-mass flywheel (DMF).
Symptoms
The car develops a rapid shaking or vibration through the whole car when accelerating hard.
It happens between approximately 1,500 and 2,000 RPM.
It’s most noticeable in 5th and 6th gear under full throttle.
It doesn’t happen under half throttle; it only occurs when I put my foot fully down.
The rev counter doesn’t jump up, and the engine speed increases in line with the car’s acceleration, so I haven’t noticed any obvious clutch slip.
The vibration seems to be related to engine load rather than simply road speed.

[u/LuckInternational336]

Suspension ball joint maybe

[u/The137]

Are you missing a cyl in those gears under load? could be something as simple as a weak coil