Okay, the TCC Solinoid is part of the Valve Body itself. On some models of Trans you have to replace it with a whole Valve Body.
To get to the Valve Body though, you have to take off the side Cover Pan, which means the Trans has to either come out or dropped with the drive axle out!
There is a harness that comes out by the side Cover Pan. The main harness though is inside the trans itself.
In my opinion, this job is not for the inexperienced back yarder!
There is 2 solinoids on the valve body & if you replace the wrong one, well lets just say you don't want to do that okay!