i didn't buy a mityvac yet, but what your saying is that my vacuum pump might be producing not enough vacuum with the stock set up and that when i hook up the transmission vacuum line straight up to the main line its getting enough vacuum? because when i was diagnosing my weak brake problems i thought that the servo was bad, i didn't think the vacuum pump was bad since the records from the PO show the pump was rebuilt in 2005. i saw a test for the servo and pump in a different thread that i should try. and also i was wondering am i suppose to feel any shifts when the car is all straightened out?

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1974 240d
1983 240d -sold
1989 420sel with om606
1994 s350 turbodiesel - sold