Interesting,
I have the same problem with the shifts since I got the adjustments on the cable and modulator pressure correct.

I'm going to measure the vacuum supplied to the modulator as soon as I recieve my gauge next week.

A quick check makes me suspect I have some sort of problem with the vacuumvalve on the IP because it seems to be totally insensitive of adjustments but I'm not sure yet.

I quoted a new one from the dealer and it was about 75USD so I think I might get one from the junkyard for comparing mine with.

My car does not have the transducer, only a green check valve directly inline with the modulator but the valve on the IP works the same way.

Let us know what you find and I'll do the same.

__________________
/Per

MB E300TDT -98