Subject - 1985 TD Wagen; Symptoms - tranny shifting late, feels very awkward and abrupt. Turbo spooling up per usual but motor not powering up with boost (banjo valve is clean and attached line both clean).
Is there a common vacuum part/function which could effect both of these (both symptoms appeared simultaneously)?
I have read about bad switchover valves and other posts in archives that would expalin tranny probs. and have found banjo valve and other inof. re: turbo performance, but have not found anything that would address both.
Thanks.

Is this the creme colored wagon I rode in?

You can try backing out the bowden cable for the tranny, that predicts how early/late it will shift.

Your performance may be bogged down by this bad tranny. I would get that taken care of before you dive into the turbo problem.

Not sure about the '85, but on my car, there is a pressure line from the back of the intake manifold to the switchover valve. Then there is another line that goes from the switchover valve to the fuel injection pump. If that line is not connected properly, the pump does not get the signal to add more fuel as the turbo spools up and creates boost. I had this problem once, the boost gauge showed plenty of boost, but the car was acting like a 240D (no offense ) turned out the line from the switchover valve to the pump was disconnected. While this won't explain your tranny problems, it does show a relationship between the switchover valve and turbo performance.

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2001 Dodge Ram 2500 Cummins Turbo Diesel - 4x4, auto, 3.54 gears, long bed
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'92 300D 2.5 Turbodiesel - sold
'83 300D Turbodiesel - 4 speed manual/2.88 diff - sold
'87 300D Turbodiesel - sold
'82 300D Turbodiesel - sold

The line from the intake manifold is in good shape, as is the banjo valve at the manifold.
John,
This is the black-on-black wagon that left early. Both probs. came up at exactly the same time. As all else seems good and the car has excellent service history, it seems reasonable to assume that a particular item that monitors or affects both the turbo and tranny is malfunctioning. I notice that there is a vacuum line that junctions with the line from overboost protector at the ALDA. Maybe something going on there.

Also, I don't know from a bowden cable. Which one is it? How does it function?

Its an adjustable cable that comes out of the throttle linkage assembly on top of the valve cover. Play around adjusting that.

Or, like you said, look for vacuum leaks.