Mine is, too. I hear it's pretty easy to do, though. Drop the pan, pull one of the other solenoids to get to the TCC solenoid, disconnect the wiring to the TCC solenoid, replace it, then reverse this procedure. This isn't the exact procedure, but it gives you an idea.
You also have to check the wiring going to the TCC solenoid as well as I guess this can sometimes be the cause of the issue. Along with this, you can actually buy the solenoid one of two ways: with or without the wiring harness. Without was about $8, with was about $40. I guess the harness is pretty easy to replace as well.
Since you'd be dropping the tranny pan to do this, might as well buy some fluid and a filter kit and replace those while you're at it.