Recently had transmission rebuilt. The valve body in there isnt my original as they said something wouldnt work. SO, they put an Identical one in, sort of. I came home and a couple days later noticed it was leaking, the pan. So, I went and got a new gasket, pulled off the pan, and low and behold, different body, wires hanging etc etc. Shifts fine, but its not the point.
If you can help in telling me where to look on the valve body to figure out what year is in there, let me know. I have some pics.

 

there is a small 2 digit year cast on it. 4L60E?

 

4L60, 1993 with three prongs on it. One year only issue. Non electronic with TV cable.

 

if it has aluminum valve body it should have the date stamp. i don't know about the iron VB.

 

Mine is a cast iron, on bottom of this ATSG page with 3 switches on the front of it. Its a YCM transmission, 1993 Corvette.

 

Went ahead and put it back together.
Did pressure test.
Park idle 80, WOT 220
R idle 100
1-4 idle 80
1-4 WOT 220.