I've been experiencing a rearend whine since about 12k, and I have 22 on it now. Dealer has been contacted multiple times. They say they know about and understand the noise, but DC does not have a fix for trucks with a standard, the fix is only for those with automatics. What I would like to know is WHAT the difference between the two is, and why the same fix from the automatic trucks cannot be applied to mine? My warranty period is coming up, and after that if something decides to buy the farm I only have my dealers word that they will fix it, I'd kind of like for it to be done and not worry about it.