IMHO lockers are only worth having once your vehicle has exceeded the grip level of its terrain appropriate tyres and/or can not maintain active contact with the track of all 4 tyres from its upward or down ward suspension travel (generally in trouble when down to 2, but sometimes 3 can still be an issue).
After these two I would say lockers would be the item I would rate third when traction is an issue... however, I would be (and am) putting a winch on my vehicle(s) before spending on lockers. You could argue that if you flick on the lockers you wouldn't need to use the winch... but then lockers aren't as much help to others as a winch is, although you could argue snatching with lockers (is that recommended?) may still be as helpful to others(?!?).
More than once, I have passed double locked vehicles going no where because I have had excellent off road tyres and decent suspension travel keeping all four in contact with the track and not bottoming out. When tyres and suspension fail I will often rely on power and momentum to be my friends!
Perhaps most importantly of all, I often find myself picking smarter (and more mechanically sympathetic) lines on a track to get to the end of it with as little pain and cost as possible.
Hooroo, Dave.
P.S. I still want lockers though... the High Country reminds me of this just about every trip out. I guess I would just like to be saying "yep" to every challenge instead of "err not today"!


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Just reviewed this thread... it's not just the ECU etc to consider: Wabco brake modulator also...the 4w traction control to my understanding had an upgraded modulator to go with the additional demands...

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