Hey Guys,
I have an '08 Suburban 2500 (LY6/6L90) that frankly, I hate, hate, the way this thing shifts. Stock was awful, horrible. I am not good with A6's and its still awful and horrible just a little less gooey. I have a 2017 Isuzu NPR HD with the same combo (Both E38/T43) that frankly, drives really nice. Shifts are crisp, smooth and without hesitation so I pulled the tune hoping to learn something, but I see it has no desired shift times, no inertia adder, no output torque multiplier etc.
1st.) So does anyone know about the history of the 6L90 tuning, like is the Isuzu missing these tables because its a commercil truck and not as "fancy" or did GM get rid of those tables because the transmission was too confused for its own good and shifted like crap?
2nd.) Anyone know if I can apply these changes to my 2008 with a Tech II? Or was there a hardware change?