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Old 09-23-2020, 05:42 PM   #5
ewoody625
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Join Date: Jan 2009
Location: valparaiso,in
Posts: 730
Re: 4L60E Trans only shifts 2 and 3

I am having this same issue with my swap. My combo is a 5.3 4l60 from an 03 Silverado, harness and computer are from the same truck. I attached a screen shot of the codes I have.
It was all working fine then as I was driving I heard the rpms go up and it quit shifting. Fluid was 2 qts low but I have no visible leaks. I checked power at the trans and I'm only getting 10.6v. I've been told by multiple people to check the trans fuse. I don't believe I have one??
I'm in the process of tracing the pink power wire from the the trans all the way back.
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Eric

70 CST10 long bed in pieces also factory air and cruise(the project)

18 Silverado crew cab 5.3 4x4

My build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=402166
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