At www.mbz.org in the articles section, there are some good articles on transmission tuning that will help. Other than that, there are lots of posts here describing transmission modulators and the like, but I would start with the articles

http://www.mbz.org/info/articles/trans/adjust/

http://www.mbz.org/info/articles/trans/service/

either one should be what you want.

later

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84 300TD - 235k - Farbe "Surfblau" bought at 213k
87 300SDL - 131k - Farbe "PimpGold" bought at 115k
00 Klepper Faltboot Expedition Double

I have a 1984 300D Turbo that has not been shifting as crisply as previous 300D's that I have driven. I don't believe that the transmission is bad because the car has only 94K miles on it and has been serviced from new religiously. The other thing that makes me believe it is something else is that I developed a leak in one of my vaccum lines and the car started shifting very crisply until I fixed the vaccum leak. Does anyone know of any components that need replaced or adjusted to restore the shift quality of my car. Thanks

DieselNation

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82 240D - 257k
84 300d - 86k

While there was a vacuum leak someone probably compensated for it by turning up the modulator on the transmission. Now that the vacuum leak is gone, it is shifting really soft because full vacuum is there. Now it is time to turn down the modulator.