Any idea what all that would cost?

Oh, the TCC shudder is at slow speeds in third gear, only

Did you get your transmission problem solved? Thanks

Not yet. Considering a flush. Someone with a similar problem was told to get a rebuild by a dealership. I usually take dealership advice with a grain of solt. I have never had a dealership come back with a cheap solution to anything.

I hate to say this again, knowing you have some new ignition components, but a low rpm trans shudder may very well be an ignition miss. It feels exactly like a trans shudder. Trust me. It'* happening to my car right now. New wires arrived today.

The shudder is sometimes at higher RPMS also. Sometimes it doesn't feel like it shifts into third, and eventually fourth kicks in and all is well. I don't get any slippage codes, which is good, I guess, but leaves me clueless.

My MSD wires are ~10 months old, the Autolite plugs are about 6. You think they could be a problem? Why would it only show up in third?

In third gear, your rpm'* are generally lower than when in any other gear, and the gearing makes it easier to feel. I can't feel my intermittent miss at all in 1st or 2nd, but I can a little in third, and a bit more in OD (TC lockup, light throttle).

I'd pull and inspect the plugs, but if you're pulling them, you might as well replace them. Mark which cylinder they all came out of, and not any abnormalities. Reading plugs can tell alot. At least you can rule out an ignition problem. Even a bad coil will leave evidence on a plug over time.