I'm working on removing vacuum issues and I've got the proper curve all through the system. My Question is now what should I be reading when I test the vacuum line to the transmission. I don't want to fiddle too much with the transmission modulator valve (already turned it 4 notches CW in an attempt to solve the slip experienced on all changes) without knowing what I should be reading when I hook up a mityvac.

So, what should I be looking for? holding vacuum or a slow leak, or what?

Also It's Clockwize for harder shifts and CCW for softer right?


(FYI I do have a transmission fluid leak, but keeping the level topped up.)

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1980 300D 300K KM - parting out
1979 300D 375K KM - parting out
2 300Ds for sale