Aaaaannnnnd, another post with some good information for ya, <font color="blue">burntPiston</font color>:
More than likely, you'll have to loosen the lower ball-joint nut, to free the upper enough to loosen the bushing.
"Douche" [img]images/graemlins/grin.gif[/img] it with a sh*t-load of penetrant first.
You may get lucky, if it hasn't been in there long, and it'll turn without having to fenangle with the lower ball-joint nut.
Oh, one more thing.
You may be able to turn the inner
portion of the bushing, but the outer
section will be held in place by the little boss on the TTB.
You still have the chart with all the different settings for that bushing?