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1. 

   Joined: Oct 31, 2010
   Posts: 21

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   old man's '37

   Member

   from Florida

   i have an adjustable vacuum modulator on a powerglide transmission and adjusting the screw doesn't make muuch difference on the shift point.

    

   old man's '37, Jan 6, 2012

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2. 

   Joined: Nov 16, 2011
   Posts: 428

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   scrappybunch

   Member

   from nj

   The modulater only controls line pressure. To adjust shift points the TV rod needs to be adjusted.

    

   scrappybunch, Jan 6, 2012

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