Originally posted by superduder
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After I put the new modulator on, I saw not change in the upshifting to 3rd. Still had to get up to about 55 before it would shift to 3rd. That transmission is now sitting in my garage.. it's very nice and clean with a new modulator. Probably something simple wrong with it but I don't know what it is.
This is a picture of the vacuum modulator. I had a piece of bicycle tube over it in the picture so I could use a pair of pliers to tighten it without scaring it. It is behind the kick down solenoid. In this picture the kick down solenoid is removed and I put a rubber plug in the hole so I would not get dirt in it.
The vacuum modulator is difficult to get to with the engine and transmission in the car.
Follow the vacuum tube from the intake manifold and you will find it.
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