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LSD Forester rear diff effectiveness Offroad


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IMO, it depends on your definition of "offroad". In some shallow, greasy mud, it might be a decent help. I certainly notice the handling difference in the snow and ice (LSD equipped car oversteers more predictably and will axis spin, I can definitely tell that our Outback VDC doesn't have it), but for real gnarly offroading, it's probably not going to get you much further through an obstacle.

 

 

I've used the comparison for the old-gen clutch type LSD that when you really needed it (lifting a front and a rear wheel), the LSD was like having a couple guys pushing on the back of the car. It's a help, but not a true traction device. And by design a Viscous is going to be even less powerful in that situation than a clutch type....

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The viscous rear lsd's are pretty helpless. I wouldn't spend more than $100 for a really low mile one. The clutch type can actually work pretty well, but you have to be abusive with them to get a lot of torque transfer. The harder you hit it, the tighter the clutch pack gets wedged together. They are getting hard to find now though and you would have to adapt the rear axles to fit the male stub axles on the diff.

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