Thread: 700r4 lock up
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Old 06-09-2007, 10:29 PM   #13
67ChevyRedneck
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Re: 700r4 lock up

A pressure switch that goes into the 4th gear port. When the load increases, so does the line pressure, so if there is enough pressure change it will unlock, if there is a lot of change, it will shift to third. That is my understanding of how it works.
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