OK - so looking at the one we are trying to install on the AOD and the shifters I have for a C4 and a C6 there is a definate difference.
The C4 to C6 measurement from the bottom or Park to the top of Reverse is about 0.5" to 9/16".
When I measre the AOD shift plate I have I get 15/16" to 1".
This matches the issue that we are having with the transmission lever (we installed the new shift lever for an AOD Art Carr shifter). The transmission lever stops in part and the shifter itself is only half way to park. If the spacing was similar to the C4 or C6 it would line up.
Can someone send a picture of the top of their AOD shifter or take that measurement so I can compare? I suspect the shifter I got has the wrong top plate. I will aslo see if there is a part number on the plate I can look up.
Tom