I followed the instructions to remove the EGR vacuum lines from the top of the valve cover on my 1981 300 SD.

The hard shifts disappeared, but I now have SEVERE flaring. From what I have learned from Brian Carlton, this is caused by too much vacuum. This makes sense, as one of the pieces of tubing I removed exhibited a lot of little dry rot type cracks. Perhaps those cracks made it so it was shifting hard, but not flaring?

I am stuck at work but I have sent my wife to Sears to buy a Mighty Vac for me. As you can tell, I have no experience with one and have not had the need for one until now.

I have been searching the archives, but I’m running out of time, as my employer’s computer system only allows us 2 hours of internet time a day. I am looking to find exactly where the vac modulator is located and how I go about adjusting it.