SuperPro 2006 Subaru B9 Tribeca Limited Rear Differential-to-Subframe Mount KitThis kit replaces the rearward differential mount bushings that attach the differential to the rear subframe. The OEM units are soft rubber and break down fairly quickly with that wear accelerated the harder they are used. The worn bushings allow more movement of the rear differential under changing loads. This can initially be felt behind the wheel as slower and sloppier responsiveness, and as the OEM bushings near the end of their life or fair it