Question about 1992 GMC Sierra

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4L80E Transmission just rebuilt, will not go into overdrive, and they are saying there is trans fluid coming out of the wiring harness, would that cause this problem?

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  • jstacey81 Jul 16, 2009

    coming out through pins in the harness, from inside the transmission....

    there was a reason I asked the question, I don't know myself, apparently they changed something around 95 with the harness....

    once again I don't know

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Get it to op temp then cycle ignition key off and on.works for me

Posted on Aug 05, 2009

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The back side of the harness is suppose to be sealed. If fluid is getting/leaking into the pin area of the harness, it is shorting out your connections preventing your trans from acting properly. Get that plug fixed or get a new one.

Posted on Jul 26, 2009

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How would trans. fluid get into the wire harness?

Posted on Jul 16, 2009

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