Originally Posted by zinsavage123
I am a little stunned a car with an engine this size, as well as being a v8 and gm's flagship vehicle at one point be equppied with a toothpick auto trans though, cant believe this has pretty much zero room for mods if 350wtrq is the limit....so many say at least.
Several factors are involved, not just rwtq by itself. RPM range, weight of vehicle, fluid temp and quality, and trans tuning will all play a role in longevity of the unit. High rpm shift points seem to be a big weak spot for a stock 4L60E. You can add quite a bit of power and not have rapid failure if you keep shift points at or below stock levels, and keep the fluid cool.