I've been without mine for about a year now, finally looked into it today. Long story short it's no wonder these things fail all the time. They aren't sealed very well from factory and have a perfect hiding hole beside the 3rd member to trap salt, grime and moisture! Not to mention the crappy magnesium housing cover that literally fell apart as I took it off!
So I'm posting this wondering why Toyota is not putting out a recall on such a problem? There was recently a recall for the spare tire carriers rusting and falling off and from my research online the E-locker actuator has been a far bigger issue for a much longer time than this recent spare tire recall.
If you agree please take the time to comment on Toyota's Facebook page, under my post there (Tron K Blum), dunno how to link to it. Or just post on the page!
Also feel free to discuss here as well this isn't restricted to just 1st Gens either!