TH-700R4 Identification numbers.
A diagram of the transmission pan gasket showint the orientation of the 16 bolts that hold it to the transmission main case.

The left side of a 1991 Th-700R4.
Another left side shot.
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Another left side picture.

This right side pic is of an '89 and later 700R4, I will get into identifying years later. Also note the transmission RPO code MD8 toward the front of this picture.

Left side without shift lever or speedometer drive housing installed.
From front to rear:
TH-2004R (note dualbellhousing bolt pattern's).
TH-700R4
The last one I am unsure about.