Where to buy stock 4L60E?
First off, you have a L31 so make sure you get the right tranny. I have one too and I know mine is a 30 spline setup.
My FLP level IV was worth it bigtime. I had it behind a 422ci and went 11.02@123mph with the car, a lot of passes on it.
Also kick around getting a GM remanufactured one, Certa I think they are called...




