Originally Posted by serranot
Mechanically, I don't know if it's correct. The fact that it's noisier doesn't mean that it's working better or worse.
If we assume he's correct, I go with the additive. For me, there is no kind of driving that I do that I need some incremental level of performance as a tradeoff for noise.
I could get a locker for my F-150 too, but the noise and feel for what is mostly highway driving is not worth the tradeoff.
The way I understand SFP's comments, and LSD's in general, I think it's likely that reducing friction between the friction plates in the LSD likely reduces it's effectiveness. Perhaps not in a meaninful/observable way. It's all relative, how much functionality of the LSD would you trade for a noise free diff? (rhetorical question)