Iirc the stutter/pause from the Rev counter is from tickover rpm to ~1200rpm and is intermittent. It occurs in neutral at standstill and in gear. (Again iirc) so if it's doing it at standstill there wouldn't be any abs signal anyway.
If it was just this fault along I'd try swapping the clocks out for a know good one. BUT there are other faults that occur at the same time. There is an intermittent lag in power at roughly 5k ish rpm like it's about to change gear but doesn't. I don't think it's a miss fire as its too subtle and smooth, it's like a partial lift off from wide open throttle. Except the pedal is flat to the floor.
There is , I believe, a gearbox shift point be fudllmemt as well that I don't think I've experienced having driven it.
Maybe Paul could confirm?
But what could affect those three things?
To my simple mind, Crank sensor "could" affect all three. But then so could gear box ecu. (I have a spare here Paul if you want to try it) I haven't seen anything to suggest speed signal,(again apologies I was confusing my tacho issues with Pauls earlier) but then I have way too little experience with electrical diagnostics to be sure of anything.
It really does need a chat with tech2. And quite possibly a damn good talking to