Slipping between all gears would tell me it's not an internal problem at this time. Could be pump too, but doubtful. If the vac issue doesn't play out, I'd check line pressure on the unit.

Vac amp is the blue UFO looking thing right?

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
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Six others from BMW, GM, and Ford.

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