One of the rubber rings near the cat was gone. I replaced it it didn't make any difference.
It'* not the heat shield between the exhaust and the lower frame where they ran the transmission cooling lines.
trans fluid level is slightly high but good.
The motor mounts are old but they are not broken and split.
I just noticed something. When pulling into my garage, there is a small step up from my driveway. I can in a little faster then normal and as the car came up the step, it made the same noise very brief.
I also notice this last test that the noise is sensitive to the side G force. If I'm going faster, a little tunr of the wheel will do, if I'm going slower I need to turn the wheel more for the noise to show.
I lifted this car more then 10 times already... grrrrrrrrrrrrrrrrrrrrrrrr.
The darn problem is probably staring me in the face and I just can't see it. Good thing it'* not a snake or it would bite me,