4L60 to 6L80
The 6L80E is only little bit bigger than the 4L60E, so its not that big of a tranny. Certainly smaller than the 4L80E that I have now. In fact the 6L80E is shorter than the 4L60E.
http://www.techlinecoatings.com/introduction.html
Looks like they have a wireharness controller to make it work.






