L86 to L8T in '19 Yukon XL Denali

[L8T BURB]

@L8T BURB, did you upgrade the axle gear, or did you keep 3.08?
Your metro/urban city MpG likely would have been improved by 3.42.

I kept the stock gearing in place. Getting a 10 speed behind that engine would have been amazing too. I am curious to hear more about the driving experience of OP.

 

[Marky Dissod]

@L8T BURB, did you upgrade the axle gear, or did you keep 3.08?
Your metro/urban city MpG likely would have been improved by 3.42.

I kept the stock gearing in place. Getting a 10speed behind that engine would have been amazing too.

Getting a 10L90 behind an L8T, even with 3.08, would've been eye opening, mouth watering, and at times sphincter puckering - but always tragically cool.

 

[L8T BURB]

@chevman88 What grade of fuel are you running in the L8T? It is designed to run 87, and that is what I ran in mine, but I am curious what your stance is on the matter.

 

[Bigburb3500]

Getting a 10L90 behind an L8T, even with 3.08, would've been eye opening, mouth watering, and at times sphincter puckering - but always tragically cool.

If my 6L90 decides to give up… I’ve been messaging with PowertrainSwap about the 10L90 being able to be used. “In theory” it should all work. I am highly curious about OPs driving experience too!