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P1870 and lockup in overdrive 1999/C5

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Old 09-03-2017, 05:08 PM
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Join Date: Sep 2017
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Default P1870 and lockup in overdrive 1999/C5

Recently did a rear diff swap from 2.73 to 3.42 with a mild tune unfortunately I'm know getting a 1870 code after about an hour or two of normal driving at the same time the torque converter unlocks and i also experience hard shifts between 2nd and 3rd i seen one the forum that raising the PWM settings will take care of this issue , has anyone tried this and has it been successful Thx. PS when code comes up trans temps start rising..
 

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