I don't recommend the PNH torque converter at all. While mine hasnt failed or had any issues to speak of, its very, very loose, which makes it horrific on the LS4. My gas mileage dropped to 12.8mpg on this converter as it constantly has to rev to about 2500rpm to accelerate at any good clip. It stalls around 2800 and flashs just above 3k, while it may be ideal for the cam I have, it makes the car feel like a tug boat in the low end. I've spoken with dave at TEP about this and he said its typical of the reman JTFM converters, as they are built around the GTP's 3800 v6. I also spoke with several LS cam mfg'ers and they all recommend getting a custom converter like a circle d, which said they would be more then happy to do the 4t65e. It would be much tighter around town and you could still probably get the stall you wanted without having to worry about it feeling "loose". I'm looking at doing this in a few months and having it swapped out.
