I've successfully had a new gear set put into my auto under warranty, when I got it back the 1st gear whine is there, but much quieter, second gear whine vanished and it now changes much smoother, snappier. :roll: One thing you have to keep in mind is the mechanics at your dealers, some have the skills to rebuild your auto, most are "of the shelf" engine part fitters. :wink1: Tell them that you want to initiate the warranty process, they will then get some warranty rep from ION to make a decision on it.