First off thanks to this community. I bought my 83' 300 SD Turbo a couple months ago and the manuals I have are worthless. This site is a wealth of accumulated knowledge that has helped me out quite a bit.

I cannot however figure out what the proper configuration of my vacuum lines should be. My configuration does not seem to match any of the ones I've seen so far. My specific issue is the connection of the switchover valve. It does not connect to the main feed at the brake booster like the diagrams show. I put the pics at the end.

I also would like to know what a valid test for the vacuum system is. I went out and got a Mitty Vac, but have not found what a valid test for a vacuum valve is. I have a really hard shift from 1-2 especially on the downshift. I put a vacuum on the transmission valve and it losses it really quick, but I do not know if that is typical. I've pluged up the non-functional A/C and door locks so I think I've got the leaks taken care of. If there is not one already, maybe I can start a thread for a walkthru on vacuum testing.

Example:

Step 5 - Transmission Valve: Disconnect feed line to transmission valve. Put 10" vacuum on the line. If it maintains vacuum it is good, if not the valve is bad or the line has leaks.

Do one of these proceedures for each device in the system for a complete system checkout.






_______________
83' 300SD Turbo - 320,000+ miles, odo stopped working a while ago ;-)