Yep - the new torque converter was not balanced correctly from the M'fr. The shop owns up to it and says it happens about 1% of the time.

For diagnosis - with the car parked and the engine running in Park or Neutral the only parts that rotate are the (pistons, crank, cam(s), flex plate and t.converter. I could find the shake at certain harmonic RPM's. An added diagnosis was to drive the car down a moderate hill, find the vibration, then shift to Neutral and turn the engine off - and the shake disappears, which eliminates yoke/driveshaft/ujoint imbalance.

The engine is not a factor because it was smooth before the tranny rebuild.

The shop mechanic sat in the car, revved it a couple times in Park and knew it was the TC.

According to the mechanic, there are two types of TC's, one for 360 and one for the 383/440 BB's. They ordered the correct part number, but they simply got an incorrectly balanced TC right out of the box.

They'll get me in the shop next week.
- Art

65 Satellite hardtop 361/4bbl console 727 2.76
67 Satellite convert 383/2bbl column 727 3.23
67 Lancia Fulvia Sport 1.3 Zagato. Alloy body, 1.3L V4 DOHC 4-spd
67 Lancia Fulvia Rallye 1.3. Alloy panel, 1.3L V4 DOHC 4-spd
71 Alfa Romeo GT Junior 1300 Zagato, 1.3L 4cyl DOHC hemi 5-spd
82 Alfa Romeo GTV6 2.5L SOHC hemi V6 5-spd transaxle
75 Maserati Bora US spec 4.9L DOHC hemi V8 5-spd ZF
77 Maserati Khamsin Euro spec 4.9L DOHC hemi V8 5-spd ZF
07 Aston Martin DB9 6.0L DOHC V12 6spd transaxle