So I've been paged. I will say there's no connection between the ebcm and trans, so it won't be causing your trans issue. I had a trans issue and ventured down the same path you're aiming at right now and I didn't get anywhere. The ebcm will however affect your magnasteer power assist features.
Read up on this: http://www.grandprixforums.net/ebcm-...ion-50176.html
Long story short, it's easier just to get the ebcm rebuilt, I tried putting in a used one and ran into problems, as I detail in the thread. ModuleMaster are awesome they fixed me up.
My trans issue is/was it would hesitate on take off. It does it less now that I've gave the tranny much needed maintenance but every now and then it will show its ass. The trans shop I went to said there was an electric communication problem between modules and then they went on to blame it on the pcm not being clamped down and blah blah. Turns out the code was for the ebcm and was unrelated.
So I'd provide more details on what's going on with the trans and see if we can help ya and then also work on gettin the ebcm repaired. Or be a bad ass and just unplug the fuse and never deal with abs again. It's entirely up to you.