I use serpentine belt wrench, slides in between the drum and the t-case and works best I ever saw.... one handed too

http://www.jcwhitney.com/serpentine-...23&zmap=362333

 

DAMN! I like to think outside the box, but I think that takes the cake! AND, I think might be the easiest way yet. And, a lot of auto parts stores rent serpentine belt tools, if you wanted to try it and not be out any money.

 

x2 Dang!

 

OK I was not going to say it but, is it really that hard to figure out how to get to that plug? I did mine the first time as a newb and sure it took a few head scratching minutes wondering what LR was smoking but the only 1/2" drive extension I owned worked (and it was not a wobble ext). I do applaud the OP for getting up the gumption to make a tool but if you can get some 1/2" bar stock cut a 1.5" piece and use a 1/2" combo wrench it will do a similar job though his hex will give you better access.