"This external system must pass onto the modulator a variable vacuum that decreases from ~15 inches of vacuum down to or near “zero” as you drive and put the petal-to-the-metal!"

Okay that helped a little. I am not having any down shifting problems. I need to know if there is a specific part where i can make an adjustment besides the ALDA.


"The green dashpot is also similar to an orifice. It dampens the changes in vaccuum level to the VCV.

Get rid of all the lines to and from the black box on the valve cover. Two of them go into separate "T's" on the driver's side of the engine. Just take out the T's and connect the remaining ends with a section of vacuum hose. Many times, the source of poor shifting is due to excessive leaks via the 3/2 valves inside the black box."

This is the culprit! I am guessing the two Ts toward the driver side are not EGR. I am going to try this and see if this works if not it is back to the drwing board.

By the way this 300sd could not make it more than a block when i got it. Recently, I took a 200 mile road trip in it. It was great on the highway but I am looking for better city driving quality. This is also diesel Benz #3 for me.