I have a lockrite in the rear of my Vit and yes if your tyres are not the same size the lockrite will engage disengage when you change gears.. It still will have a slight movement / wiggle in the rear even when the tyres are the same size but not enough to make the zook change lanes.
I'll aggree with Royce on this one, if you can go back to a normal open centre for a while and then put the lockers back in after your used to it, that would be a good idea.
