2-3 and 3-4 flaring

[Biodome]

Hello everyone I have been doing a lot of research on the transmission's reliance on the vacuum system because my 82' 240D started having flare ups on the shifts from 2-3 and 3-4. One worry I have is how long can I drive with these flare ups before it should be a concern? The only time I have is on the weekend and it worries me that I may be running the engine very hard. I have to really push the pedal down to get her to shift. When she shifts I can let up the throttle and settle her down. The same thing happens with the shift from 3-4.

The 2-3 shift flare up happens at around 33 mph.
The 3-4 shift flare up happens at around 55 mph.
Each of these shifts are soft.

I know the culprit is the vacuum. I have a vacuum gauge but I am going to purchase a mityVac to test everything. I have also heard that if I spray carburetor fluid or some other fluid around the hoses and whenever the idle revs up that is the general area where the leak is at (I think that is right but I want to check it through the mityVac for the experience)

Since my door locks have been acting up I am going to plug up the vacuum lines to the doors to try to isolate the problem in the door lock system.

She doesn't want to turn off on me after I have been driving around town never really going above 45 mph, so I have to turn her off manually using the stop lever. The thing here is I have to rev up the engine before pushing in the stop lever and the engine will cut off. This is another concern of mine, when should this be a bad thing?

There are a few things I know I have to do.
1. Check all vacuum lines and the main line should pull around 10-12 in. and should be zero at full throttle.
2. Make sure my T connector orifices aren't clogged.
3. Replace old hose connectors and hoses
4. Check vacuum diphragm
5. Replace shutoff valve
6. Replace Vacuum Valve : 3/2 Way
7. Adjust VCV and transmission modulator.

Is this right? What should I do first? How worried should I be? Is this thread too long? Hope I covered it all and thanks for all your help and the information that I have learned about my 82' from this forum has been amazing.

All comments greatly appreciated