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I think most of these trucks downshift too soon with the factory computer setup. Another good use for a programmer, you can adjust the downshift speed setting and/or the throttle position before downshifting. But that's talking about the 4 speed automatic, the newer 6 speed autos probably make it a completely different combination that doesn't have that bad behavior.
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69 Z28 JL8, #'s match - being restored |
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