6L80 to 6L90 Swap

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03-19-2014, 08:44 AM

blownescalade62

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6L80 to 6L90 Swap

I would like feed back from ones that have swapped from 6l80 transmission to the 6l90. I'm looking at one from a 2007*Chevy Silverado*K2500HD 4wd. This will be going into my 2011 Escalade AWD. What is needed for the swap?

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03-21-2014, 08:36 AM

blownescalade62

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bump Anyone

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03-21-2014, 07:38 PM

TrueBlueGTO

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You will have to change the TCM to a 2010+ unit.

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03-22-2014, 04:40 AM

blownescalade62

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thanks

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06-28-2015, 04:17 PM

Seanh

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They use the same cross member, but with the 90 being longer do you need longer front and shorter rear shafts then? Any other changes? I am leaning towards doing this myself.

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07-03-2015, 02:00 PM

TrueBlueGTO

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Quote:

Originally Posted by TrueBlueGTO

You will have to change the TCM to a 2010+ unit.

Apparently there is a new TCM out there that is compatible with all programming from 07-15. So run the TCM through your parts department first before spending money to get a new one.