4l80e won't shift

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03-03-2014, 09:21 AM

#11

03sierraslt

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Did the harness come with instructions?

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03-03-2014, 09:29 AM

#12

blownVmax

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No, just the harness in a bag

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03-03-2014, 10:53 AM

#13

shupe

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Quote:

Originally Posted by blownVmax

Do you have any idea which codes to disable?

I used the frost harness on my swap.
My experience, Tuned by frost 4L80E conversion harness and T42 compatibility [Archive] - EFILive Forum

Instructions included on my harness package:
Max out Trans Component Diagnostic Enable Temp in Trans Diag Tab
Ignore front VSS sensor (leave unplugged) and disable input speed sensor (if applicable)