jlkrich2003

The 4L60E is the way to go for a Z. This is the electronic version of the 700r4 and can handle anything you give it. That is, of course if you have it built to handle it. The 4L80E is overkill and is used in very heavy trucks, mainly for hauling heavy loads. The weight difference is i quite alot. I have a built 4L60E in my 4X4 truck (handles 550 HP), and a 700r4 in my 240z (handles 550 HP as well).