Do you really want to hear my stories since I blew up TWO 5.9 Cummins and lunched over a dozen transmissions from NV4500's to G56's to the crappy 48RE? Of course quite a few of the issues were lack of maintenance on my part, and of my employer, but having said that, I miss not having one as my daily driver. I still have a 93 12 valve but rarely use it. I drive a 2015 2500 Hemi and tow quite frequently with it, and at 56K miles have not had a single issue, and have no problems going up major hills towing 11K lbs! I can't even really complain about the gas mileage towing, but empty it is definitely down compared to a Cummins but I expected that.