Well, I had some suspicions of my own about what was causing my TCC shudder, and I finally did something about it. Post fact, Iíve gotten rid of probably at least 90% of my TCC lockup issues. Everything is (almost always) nice and smooth now Ė even while accelerating with the TCC engaged.
So what did I do? New battery. Thatí* it, thatí* all. I started thinking about it during a class on the 4L60 where the person teaching the class mentioned that a lot of strange things can happen in an electronically controlled tranny when you canít supply a constant voltage because a battery is dying. Well, I finally had enough of my old battery yesterday (car barely started and was stumbling at lights trying to keep the battery charged) and picked up a new one.
I noticed the change right away Ė things were suddenly smooth and quiet. If youíre trying to feel it, you can still feel the TCC lock and unlock, but ití* much
more smooth than before. In about 100 miles of driving since I put in the new battery, Iíve only felt the TCC shudder like it used to a few times.
Now, the disclaimer (have to have these so people donít get mad at me) Ė this solved my particular problem (most of it). But the fact that thereí* still occasionally a problem means that (in my case) ití* not just
the battery. Which means that in your case, it may have nothing to do with your batteryÖ so please donít get mad if you go out and replace your battery and donít notice a change
Ė that said, those of you with TCC issues should start thinking about how old your battery isÖ it might have something to do with it.