1986 SDL thats not shifting. I can go about 30 MPH max. I checked the vacuum tee'd out of the Brake booster. 22 HG running, stopped 18 HG held 10 minutes so I disconnected. Is this too much vacuum? Overboost vacuum hose was shot so I changed it and all the others near it. Fluid and filter serviced. I drove it 400 miles in August, it didn't want to shift until warm, now no shifting. Thanks Shawn