Oh, so if you really want an up grade, why not a 4L80E. But its not really needed.
I really would like a plug in play unit. 4l80e ideal but not willing to do all the mods needed. I like the 4l60e. Just wish they were made of titanium. Trans shops around here lost my trust. This one currently I have is from gm so I'm hoping the guys who built it didnt rush. Also there supposedly some upgraded parts they put in it.