Quote:
Originally Posted by carguy138
OP I'd suggest having the rear end checked out, something doesn't add up. Might be a wheel bearing or differential bearing on the way out.
Was the driveshaft dropped during the install? If the center support bearing isn't properly loaded, it will sound exactly like what you are describing. Also if the rear differential was dropped and the driveshaft nut wasn't fully re-tightened, it could be binding.
FYI I have delrin subframe bushings and experienced no change in NVH. I did notice gear whine after I installed delrin differential bushings which became worse when I installed a rear differential brace.
When I installed the Wavetrac, I ended up removing the differential brace and am very happy with it now.
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They replaced the CSB at the same time and I did think of this, but this shop is pretty top notch so I really don't think they F'ed that up. It sounds like road/tire noise and not a bearing noise though anything is possible for sure. The fact that HPA and AKG (and the shop I used) recommend against it due to NVH makes me think I may not be crazy but of course I can't definitively say nothing's wrong with my car's rear end.
The thing is, everyone who says they like the solid bushings also say there's no added harshness and that's just simply not true either. I have a fairly soft suspension setup and absolutely no doubt about it, it's way harsher with the solid bushings. My gripe is the noise, but it's very noticeably harsher as well which a bearing wouldn't cause.