Juddering after some work

When my Gen 3 started juddering under acceleration it turned out to be the crankshaft pulley de-laminating and the outer section wobbling, I couldn't figure out what it was until one day I was pulling away from some traffic lights and the vibration completely stopped.

And the ignition light came on.....

The outside of the pulley had dropped off.

If the car still has operational vacuum hubs check the pipes have been fitted back to hub, easy to forget if distracted. Not sure what impact this will have on the engine operation if any, but your 4x4 won't engage and it's worth a check.

@Scimike - 4x4 hasn't engaged since I've had the car. Assumed leak in the pipes along with signature flashing lights. Need to get manual ones! I will check this though, as my BIL definitely mentioned something to this tune since he knew the vacuum system was broken.  

@facade - Hope it's not this!

Wouldn't you all know, that it didn't judder at all on the way home from work, or this morning. Felt it jolt a little after I put my foot down when I was out and about last night, and power loss has gone completely since then. Thanks for all your help! Will continue to track it (along with fix all the little issues!)