It should. I was considering buying an early 80's TD which had been maintained by Stu Ritter. It had about 200k on it. When I called them to discuss its maintenance history, they assumed that in that time the transmission would have needed to be rebuilt. I guess that means that the expected life according to experienced mechanics is less than 200k.
I also looked at another early 80's TD which had had its transmission rebuilt around 100k.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13