Originally Posted by lets_go_bills
My understanding, and please correct me if I'm wrong, is that warranty work will only be refused/denied if they can prove that the mod you did is the cause of the malfunction/problem.
I'm pretty sure it's that simple.
Also, I bet the first words out of their mouth is denied. It will be up to you to fight with them to make them try to fix.
If my trans starts getting any harder to shift 1-2 gear I might be finding out all of this first hand. My feeling is it won't be the tune but the MGW shifter they will try to blame.