Here's a tool that anyone can make for a couple of bucks to cut the frozen boot from the plug on just about any vehicle. ;)
Making an Inexpensive Broken/Ripped/Torn/Melted/Fused Spark Plug Boot Removal Tool
Give Tool Source a try...fer $45 plus shipping/tax. ;)
http://www.toolsource.com/12mm-door-hinge-bolt-wrench-p-148538.html
I'm sure Snap-on or MAC Tools would have an equivalent. Don't even bother with the sets from Sears (vendor) or Harbor Freight...they are too short to git enough leverage. :(
A little late to the party but I just sold my Scangauge II to my neighbor who has a 1999 Tacoma 4WD auto. The transmission temp Xgauge works fine in his Tacoma. :D
No go in my 1998 T-100. :(