These articles may be of interest:
http://www.4x4wire.com/toyota/maintenance/front_end/
http://www.4x4wire.com/toyota/maintenance/front_end/reassembly/

The latter mentions the 54mm or 2-1/8" socket. Here's one place that sells them if you can't find one locally:
http://www.marlincrawler.com/hardware-tools/tools/54mm-socket


I've heard of people making do with a hammer and a screwdriver in a pinch, but I wouldn't recommend it.


'97 4Runner, '06 F350, '86 4Runner, '05 WR450
http://home.4x4wire.com/erik