Here is what I posted to another person who asked a similar question:
Im going to show pics of the result of taking off the speed limiter. They are from another site, but I think it is extremely inportant to show them.
http://fordmods.datamine.tk/gallery...ge=IMG_4523.JPG
http://fordmods.datamine.tk/gallery...ge=IMG_4521.JPG
http://fordmods.datamine.tk/gallery...ge=IMG_4528.JPG
http://fordmods.datamine.tk/gallery...ge=IMG_4538.JPG
Complete tailshaft failure, took out, the shaft (duh!), gearbox, exhaust, pobaly other ****** too, yet to see. Plus for some reason both airbags deployed.
Let go AT 192 KPH.
So there you go, Dont remove the limiter unless you change the tailshaft.