I'm sorry to add another hard shift thread, but I have researched pervious post and still dont undertand my problem.

I have concluded that I dont have a vacuum leak that is causing the shifting problem. According to other posts I should now look at the vacuum modulator on the transmission. I understand that it is under a cap. I cant find the location of the modulator for the life of me. My vehicle is a 1980 300sd.

I guess my main question is where the hell is the modulator so I can adjust it with the "T".

Also, The car seems to shift normally from 1-2, but hard from 2-3 and harder from 3-4 with a clunk.

Thanks

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1998 E320 150,000
1980 300SD 240,000
1965 190D 79,000