1995 MB S320, transmission problems

[pocomaxa]

Hello to everyone!!! I am new to mercedes world and i am already having problems i am trying to overcome. Me and my friend overhauled 722.5 automatic transmission and during this process i guess we screwed up all possible factory settings. We replaced pressure control cable, modulator switch, so problem is my car shifting chaotically. MB will shift from 1 to 2 at around 4.0-5.5 k RPM then comes 3rd slips a bit and goes to 4th, downshift seems fine. At dealership technician looked , he tried to adjust shifting with pressure cable and said nothing affecting this problem...but he noticed that one of vacuum lines was disconnected, he re-connected, but no effect. We tried to bring shifting points down to normal range with pressure cable and modulator switch..didn't get any results yet. ANyone out there who can point us in a right direction???
Oil changed, modulator valve unit changed, discs inside changed, seals changed, lots of things changed. When you press accelerator steadly light, it will always shift exactly at 4.5k rpm from 1st to 2nd other gear seem doing better in compare to 1st and 2nd. Any idea would be GREATLY appreciated.
Best Regards
MB fan