Cool, let me know what you find.
I am trying to track down a boost leak myself...I'm not getting the full "blast" until around 2400 instead of 2000 like a few weeks ago, so maybe the trans always acted like this but I didn't notice because I was accelerating past it faster!
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Dan
2005 E320 CDI - 246k
1987 300SDL TD05-16g, Herlevi pump, Elbe manifold, 2.47 LSD - 213k
Past: 1987 300D - 264k