Originally Posted by jdemetry
SFP sounds more informed than me, but his argument seems perfectly sound. In engineering, there are always trade offs. Nothing is the strongest AND lightest possible design. You want to get rid of a noise caused by excess friction in non performance driving situation, you may sacrifice some of the effectiveness of you diff in performance situations.
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.