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Old 11-21-2011, 01:49 PM   #1
JJAB
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4l60E/4L80E Transmission

Guys, can you clear something up for me. I have successfully completed two 99-02 LS1 conversions where I purchased the entire setup(motor, tranny, harness and pcm). Here is my question, I was given a low mileage 4L80E and I am about to purchase a 2001 6.0. If I purchase a harness that was on a 4.8 or 5.3 with a 4l60E, how difficult will it be to make the harness capadible wth the 4L80e.
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Old 11-21-2011, 06:20 PM   #2
Clyde65
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Re: 4l60E/4L80E Transmission

I think the only differences would be in the tune, if that much.
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Old 11-21-2011, 06:31 PM   #3
usmcchevy
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Re: 4l60E/4L80E Transmission

Swap a couple wires and add the wires for the second VSS (actually the ISS) then get the tune changed.

http://www.performancetrucks.net/for...g-swap-413157/
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Old 11-22-2011, 11:01 AM   #4
JJAB
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Re: 4l60E/4L80E Transmission

Thanks Guys.
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