I thought I'd post this as it might help others and prevent a costly damage to their Autos
(It's not like the early hold and fords where you just pushed a TC in and that was about it.)
I had my Torque convertor recoed and was fitting it this afternoon into the bell housing.
I have heard a bit about people fitting torque convertors and smashing their oil pumps on the auto and trashing flex plates.

After having a squiz at Ashcrofts site in the UK on ZF transmissions, and it lists the final seating depth of a correctly fitted torque convertor according to the last 3 numbers of serial number on the side. I noticed there was a lot of variance depending on serial number. (" Oils and Oils Sol ")

I lined up the oil tangs with the TC and lowered the TC into the bell housing, I heard a click and it sounded like the TC had dropped in correctly. Once measuring the depth of the TC from the top of the bell housing it was 18mm lower, the info on Ashcrofts site stated my one should be lower and should sit at 27mm below. I turned the TC some more and heard another clunk, it dropped lower again, but still not to spec, then some more turning and it made a thud noise. It now sits 27mm as per specs.

Interesting, that one shouldn't assume that it was correctly seated just because you hear a clunk.
This may be the reason why oil pumps in autos get trashed after a short while.
This is a list from the Ashcroft site and it interestingly shows how much variation there is from 18mm to 96mm

Torque Converter Depth Table
The box code is the last 3 digits of the second number down on the name plate on the left hand side of the autobox.
Box Code.....................Depth in mm
061.................................. 22
064....................................22
065....................................27
332....................................51
593....................................51
699....................................51
727....................................27
728....................................83
740....................................51
741....................................51
742....................................51
744....................................18
748....................................18
747....................................27
757....................................27
759....................................27
763....................................83
764....................................27
765....................................27
766....................................96
767....................................27
768....................................83
769....................................83
773....................................96
Thanks to Ian Ashcroft for providing this info on your web site.
regards, Mario