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Using a 2011 4l80e with 2005 pcm

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Old Jan 27, 2018 | 05:32 PM
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Default Using a 2011 4l80e with 2005 pcm

New to LS swaps but I’ve been doing a lot of reading and learning. I just picked up a 2005 LQ9 motor with everything I need including the DBW pedal assembly.

I Know I have to flash my pcm because I am going to run a 4l80e and the motor has a 4l60e flexplate.

i know a guy that has a 2011 4l80e forsale but I’m not sure if it will Work with my 2005 pcm being the computer is 6 years older than that transmission? Did they change anything on the tranny that would make it so my pcm couldn’t run it?
thankss for the help !
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Old Jan 27, 2018 | 06:42 PM
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Pretty sure all you need is an adapter harness, and a tune. There's people that make those, just Google em and give em a call.
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Old Jan 27, 2018 | 07:02 PM
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Yeah I’m already having my harness converted to plug into a 4l80e, and I’ll have the correct tune put on it for a 4l80e....

i just want to make sure my 2005 pcm can run a 2011 tranny or if they changed some things that no longer made them compatible.
I don’t want to buy a transmission I can’t use
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