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And a limited slip will only grip up to a certain point of stress difference between the two sides. We sometimes go beyond that point when traversing diagonal ditches, so I've been looking for something with full traction control. People who are ok with sacrificing on-road handling solve this by installing locking rear differentials, and even sometimes locking front differentials.
Given how cheap a limited slip differential is, I really don't understand why they're not standard with on-demand 4wd systems like our Pathfinders'. As you've found, the system has some huge weaknesses. Why bother to add so much gear to get 4wd, then leave it severely handicapped? I suppose the best would be lockable/limited slip differentials in all three positions.
In your case, it will be easier to make your rear differential a locker, since making it a limited slip will require replacing the rear axle. I'm glad I knew about this when I was shopping for the Pathfinder, and made sure I got one with the lsd.
For more bad news, you should research how to keep your automatic transmission alive. (Add third-party transmission oil cooler and bypass the stock one.)
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'91 Pathfinder SE 5spd (now sold)
'06 Suzuki Grand Vitara JLX-L
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