My mechanic replaced my vacuum controlled shift valve on the top of the vavle cover last week. He checked each component in the transmission shifting with a vac pump. My modulator checked out fine as did the valve on the injection pump. Until friday it was shifting the best it ever has done. The first vavle he put on was defective and he said he hoped the batch his parts guy got was not totally bad or he would have to do to the Mercedes dealer and get one. He installed a second vavle. Friday my car started reving up before shifting into gear. Everyone on forum said check the Bowdin cable. It is fine. No vac lines broken or unhooked or leaking But that valve on top of the cover is what works the Bowdin cable. If it is bad, then maybe it would cause this? (Engine revving to 4000 RPM before shifting into 2nd and 3rd gears. Can't call mechanic back until Monday.

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1982 300SD Light Blue
2002 Honda Accord SE
1974 Toro Wheel Horse Tractor
2000 Toyota Tundra Pickup