I bought a 65 plymouth with one and it is great. I am putting one behind a aluminum Hemi in a 65 Coronet. I also have a camaro with a T 400 and gear vendor and I thnk the 4L80 is better hands down because of the on the fly programmer.
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I've known Lonnie (Extreme Automatics) for a long time he a great guy and builds great units. We were talking because I was trying to decide which trans to put in my cuda behind a 588 kb hemi I was thinking 727 and gear vendors but he said and it makes sense if you run a high stall non lock up converter when the gear vendors goes into overdrive and the rpm drops the converter never couples and slips more so it does not work for what I was looking for so I'm going with a 4l80e plus I like the idea electronic shifting hard to manually shift consistently and not over rev it once you start going fast and an air shifter is not practical for the street.







Doug

MOPAR or NO CAR!!!
1965 Dodge Coronet soon a 6.1 Hemi with a Magnson blower 810 hp on pump gas
1964 Dodge Polara 582" Indy alum Block 426-1RA heads,
1933 Plymouth PE all Steel, LT1 4L60E
1959 Plymouth Savoy 33,000 mile survivor
Old cars are never done. They are ongoing projects!