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clinebarger · 12-02-2012, 08:47 PM

I responded to your other thread,

Just a thought....But if you are running a 4L80E harness with a 4L60E trans & ECM.....Those codes will set because the 4L80E does not have a 3-2 downshift solenoid or a TCC solenoid,

Check the harness for pins "T" & "U" at the trans plug.

12-02-2012, 08:47 PM	#2
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: Trans codes 0740 & 0785 help I responded to your other thread, Just a thought....But if you are running a 4L80E harness with a 4L60E trans & ECM.....Those codes will set because the 4L80E does not have a 3-2 downshift solenoid or a TCC solenoid, Check the harness for pins "T" & "U" at the trans plug.