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Necropost
Just an FYI, the Drivers side National 710318 is not correct and will leak.
OEM ID measures 36.65
National 710318 is 37.00.
Just installed the National 710318 in my new trans rebuild, when to put in the drivers Intermediate shaft and easily saw a gap between the shaft and the seal. Checked the ID against my OEM seal from my other trans and saw the difference.
Luckily my OEM one is still good so I was able to swap it into the new trans.
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Most seals have the size in mm on them. We have a bearing company local that also carry seals and they can measure them for you.