I just installed the NM Torque Arm Bushing in my R61 JCW All-4 over the weekend. I had read enough to know there would be a slight increase in the NVH due to the harder poly inserts but was curious if this would subside to any degree. Mine is an automatic & any time I come to a stop in non-sport mode, there is a very harsh vibration that pulses & then subsides, i'm guessing due to RPM fluctuation.

In sport mode, the vibration is so damn bad, it's vibrating my teeth out and I'm not exaggerating. Is there a break-in period for these things and has anyone else experienced this?

There are a few threads on NAM but couldn't find many articles relating to the vibration. If this is how it's going to be the entire time, it's coming off this next weekend & the 1st $20+shipping can have it. I'm all about a sporting feeling but the tradeoff from the NVH far out ways the tiny increase in responsiveness.

 

I have a manual, never felt anything like that.

 

I have one in my 2012 ALL4S auto and it wont go away or lesson with time. mine has 50k on it and feels like day 1. Make sure its torqued to spec to minimize. If I remember right it was 80 ft lbs.