This is exactly what mine did, a while after I rebuilt my diff. My hypothesis was that the slack diff bearings hide the scrabbling Haldex as there's much play in the gears. Removing the play with a good diff shows up the Haldex issue. There are...

i'm not in UK so that's not an option unfortunately - also, my question was primarily whether I can try to figure out whether it's diff or really the accumulator for which the scrabbler stopper mod helps

Hi folks - I'm by now familiar with all the juddering issues, auto fault finder videos etc. Quick genesis - droning noise from rear diff, had a diff shop rebuild it, droning went away - very soon after I started getting juddering in full lock...