Memory ain't what it used to be. The electric dozer was announced around 2009. And it's only a D7E version.
http://gas2.org/2009/09/18/caterpill...rid-bulldozer/
There's a new D6T in our shop right now and unlike the old days, it's not a high drive and is low sprocket with hydraulic motors / final drive. Again, eliminating the torq and tranny.
Machines are changing so much it's hard to keep up!
Sorry, don't mean to high jack your awsome news thread but here's one more new innovation that will blow your mind!
http://youtu.be/N4HlGBfQgL0