Kangoo 1.5 DCi - Excessive vibrations above 40mph

Warbling throbbing vibrations bad at low speeds and then then even worse above 40mph

Car is drivable between 20 - 40mph by feathering the clutch to reduce the worst of throbbing vibes.

Have had both front wheels off and both bearings are fine, no play spin freely

Have replaced the offside longer driveshaft but unfortunately vibes still the same.

Q: Should I bother replacing the shorter near side drive shaft in the hope it fixes it or is this gonna be a "differential / gearbox" problem...

Kangoo 1.5 DCi - Excessive vibrations above 40mph

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