Remains to be seen how long it will be before the new one starts growling again. Have heard of a few that have been replaced, some were ok, some wern`t, so its gonna be interesting to see the miledge results on the trucks that had the new TC put in. Some have reported that the new TC was noisier than the original one that came out of their truck. I know this to be true, because some of those guys are right here on this forum talkin about it. Anyhow, good luck to you guys that have good results, i hope for yall`s sake that it lasts and stays quiet. Mine rattles and groans, but i`m not letting them touch my truck until it blows the transmission out of it, THEN they`ll have to replace BOTH the TC and the transmission. My TC noise has not ever gotten worse, nore has it ever gotten better, but i dont want them making my truck worse off by touching it, which seems to be the issue around here at ALL the dealerships. Every recall they`ve done on my truck has made my truck worse off and i am NOT happy about the sh!t quality of work they`ve been doing to my truck.