6L80 to 10L90 swap? Seeking insight on a 10 speed transmission upgrade

[Pilot]

Excellent news!! Thanks for sharing! I am seriously considering this swap!!

@Pilot what are you running in your front and rear diffs? 3.42?

I do know what GitHib is. I, my team, and company use it a lot!

Awesome! I’m running stock diffs in my 2015 Tahoe LTZ. Not sure what the ratios are.

 

[Pilot]

@Pilot Thanks for coming back and for the updates.

I've been trading some emails with PSS as well, getting more details on the required mods and steps; The 10 speed swap kit includes an unlocked TCM with a factory GM 10 speed tune out of the box.

My question for you is: Have you just been running the 10 speed transmission with the included TCM 10 speed tune file included in the swap kit or did you have the TCM fine tuned later after the installation and swap was completed?

I’m running the tune just the way it came from PSS. No changes on my end.

 

[jaxscuby]

has your gas mileage improved at all?

 

[Bigburb3500]

I’m running the tune just the way it came from PSS. No changes on my end.

Thanks you for coming back! Glad the swap went well! I have a few inquiries into them but they haven’t responded….

 

[gmartin1215]

@swathdiver can you plug the 10L90 into your fancy spreadsheet with 3.42 and 35" tires to see how it compares to the same diff with the 6L80, and also with 3.73?

I am curious if swapping in The 10L90, I may not need to upgrade my diffs to 3.73 from 3.42 that I was considering doing with my 35' tires.

 

[gmartin1215]

Awesome! I’m running stock diffs in my 2015 Tahoe LTZ. Not sure what the ratios are.

Ok. Guessing you have 3.42 on that LTZ. But thanks for responding and glad this tranny is working out. Been serious about doing this since I first saw this post a while back!