no mate that's the brake lock diff (bld) or there's electronic brake distribution (ebd) which applies brakes to any slipping wheel leaving drive on any wheel that aint slipping. if 3 wheels slip the drive theoretically all goes tothe one wheel which isn't slipping. which then starts to slip itself because one wheel has no chance of pulling the car out of the bog if the other three have no grip. at that point i think the computer has a mental breakdown, cannot decide what to do, whether to apply brakes to all wheels or let all wheels spin, or selectively try random wheels to see if they will take the drive, or let the whole software crash until some one else sorts the problem and reboots it. whatever the best thing to do with that bit of software when put in a 4wd is to remove it.
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