When I bought my Tacoma, I purposefully chose the model without the E-locker. I don't like electronic devices that stop working after a number of years. I installed a Detroit Truetrac. http://www.eaton.com/Eaton/ProductsServices/Vehicle/Differentials/detroit-truetrac/index.htm
It's a mechanical limited slip that does not use clutches that wear out. It locks up quickly and smoothly when needed, but doesn't have any of the bad characteristics of a locker.

Don't just be a survivor, be a competitor.