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C6 Problem

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Old Oct 25, 2014 | 08:02 PM
  #1  
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JB78f150
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C6 Problem

Here's what I got.

1978 4x4 c6
My truck acts great when its cold but once its warmed up it, on deceleration it likes to downshifts once you let your foot off the gas. Even into first gear at lower speeds. Anyone knows anything I can adjust to fix this?
 
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Old Oct 26, 2014 | 12:50 AM
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You need to check the vacum modulator, pull the vacum line off and check that it has vacum to it and that no tranny fluid is present
 
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Old Oct 26, 2014 | 10:51 AM
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What kind of vacuum does it need?
 
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