Quote:
Originally Posted by Mike Something
4L80E = 4L60E w/ different internals?
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No.
4L65-E is a version of the 4L60-E with better internals.
4L60-E is an electronic derivative of the old TH350.
4L80-E is an electronic derivative of the old TH400. Stronger but heavier.
First gear in a 4L60-E is 3.06. First gear in a 4L80-E is 2.48.