2015 1500 5.3 6L80 Swap to 8L90

MrRosado · February 18, 2020

On 2/12/2020 at 7:57 PM, flyingfool said:

Richard Wardell will tell you how to do it, he's on youtube, so you'll have to track him down to get his shop phone number.

I got in touch with Richard and swap would require a new ECU wiring harness on top of the harness for the TCU, and a laundry list of other minor tweaks and modifications. Long story short can it be done yes, is it worth it no. At this point I think when the time comes I will just have the 6L80 rebuilt with parts that address the known issues and weaknesses of the 6L80.

tmo · February 18, 2020

They started putting the new 10 speed in the later Tahoe’s, Escalades and Suburbans. Wonder if that would be better than the 8 speed?

flyingfool · February 18, 2020

1 hour ago, truckguy82 said:

If that’s all it is, anybody who doesn’t tune their 8l90 is missing out big time

It’s awesome in the camaro.

not sure any trans after 2016 is reprogrammable , software is under lock down

CamGTP · February 18, 2020

2017, 2018, 2019's and maybe the 2020 camaro TCM's can be programmed, it's on the HP Tuners website.

It requires an unlock service plus the credits to do it. Note this is only of the 8 and 10 speed transmission. 6 speed TCM's do not require this service.

The 2019's are for the camaro/corvette, surburban/yukons that are still running the E92 computers. The T1 trucks have nothing for the TCM's yet.

flyingfool · December 7, 2020

what is it?

i will be impressed with your skills if you pull off a big segment swap..

flyingfool · December 7, 2020

On 12/5/2020 at 1:14 PM, TrkNrrs said:

I bought everything for this swap

8l90 trans

matching electronic transfer case

2017 8L90 cooler line set

L83 and 8L90 engine/trans harness

8l90 tcm

But I want to know if I can get get a flexplate and torque converter from a gen 3 Ctsv to work for me? If anyone has a definitive answer..

** nevermind finally found the part number for ctsv flexplate**

Will be reprogramming the bcm and gauge cluster as well when it goes in, will let you all know what’s up when it’s in