Honestly I think the auto transmission might be built tougher than the numbers GM has put out there. The only problem I have after 60k that first to second lurches now but I've also been tuned for 40k miles and she has a lot done as far as bolt on's and free mods go. It's holding up pretty strong and I would assume that the 245whp mark will finally do it in. All I'm trying to do is see how far the automatic transmission will last before it goes but I also just don't have the funds to support what I'm trying to accomplish while also supporting another project at the same time. You can only do so much when your funding is split between 2 cars, an apartment, and insurance.