What year/model was this? Plugged three way may be for the vacuum
locks. Vacuum line routing varies year to year and sometimes within
the year.. You need the specific diagram for that vehicle.
It should never go into second at 60. It could go into third.
Sunvalley website has vacuum diagrams and trans tuning info for most
Diesels, but the article is just generic for Diesels. the
differentiations are in the text and diagrams.
Donald Snook via Mercedes wrote on 9/30/19 3:06 PM:
Anybody have an actual picture (rather than the diagram) of the vacuum line
routing? I think there should be 3 lines going into the switchover valve. But,
I have 1 or 2. I also have a 3 way connector that only has two hoses going
into it.
I remember something about one line that a lot of people put a golf tee in.
But, I don’t remember which one.
My locks don’t work — and I’m not worried about that now. But, that could be a
symptom of vacuum leaks.
I’m wondering about the lack of power. Either I have forgotten how slow
these really are. Or, there is something wrong. A few things seem odd.
Almost zero smoke with hard acceleration, some at start up. But, even with it
floored climbing a hill, there is no smoke.
Transmission either shifts very early or the kick down isn’t responding. I was
able to drive consistently at 75-80. I even climbed a hill at pegged it at 85
and it was still accelerating. But, if I floored at 60, it accelerated but did
not downshift. Maybe that’s too high for it to go into second?
Donald H. Snook
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