Originally Posted by Bones
I would need to see them to tell if it is a part number, machining or an orgin date. Is the number lasered into the TC, or is it on a sticker? We made all the 4R converters in house here in Livonia so I should be able to reference them fairly easily
It is lasered in. They look identical but I wonder if there any differences I have not noticed like stall or anything else possible.
The other does have numbers etched into it also which look like 3-85-23-94 or 96-724
I think the two numbers before the last three might indicate year, so the first one I identified would be the correct one from '99.
Does that seem right?