I just bought my wife a 2011 dc prerunner saturday before last. Last saturday we loaded up our dirt bikes and gear in the back (about 600-700lbs). I noticed the rear was sagging pretty low and seemed like I was getting on the overload springs. Also, this raised the front a little and the steering wasn't as responsive. Then, I found this forum and looked over the tsb. I called my dealer and they said they will do it but warned me that the ride would be VERY harsh when not under a load. We haul two full sized dirt bikes in the back and occasionally pull a 14ft utility (not enclosed) trailer with one other full sized bike and 3 kid sized bikes on it. We do this about once a month. Do you guys recommend that I go for the upgraded suspension? My wife is a little worried about the VERY harsh ride the dealer described. My gut is telling me that they just dont want to do the work at the lower margin, so they are exagerating the VERY harsh ride. Sorry for the long post. Please, give me your opinion especially if you have had this done.