[QUOTE=Flip boy;12596519]
Originally Posted by
rc car guy
I have three 4.2s and the one in question has a new idler ,diff gear and aluminum top shaft with a triad slipper(avid centering kit) the other 2 are whisper quiet and bone stock,also im just asuming......and it is only a low speed pitch issue
Also check that your top shaft and make sure it is straight. There have been several reports of bent top shafts in this thread and the thread specifically about the kit. The way AVID ships the kits (padded bag via USPS) leaves some room for bending during shipping. If it's bent contact AVID, they have replaced them for others.