Hello all from across the pond!
I'm researching a problem that I'm having over here in the UK, and was wondering if you managed to find a solution to your issue with the 4WD light coming on.
I have a Stagea over here, exhibiting exactly the same symptoms. All 4 tyres are the same, all replaced at the same time, but I get the slight juddering while driving along at constant speed occasionally.
Sometimes it can go for weeks without happening, sometimes as soon as I get to the end of my road it'll start.
If I turn it off and on (Microsoft Reboot Engineer tactics) it works fine after that (sometimes).
Did you find a fix for the problem at all?