Anyone experience vibration AFTER installing lower pulley??

YellowCobra28

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Is there anyone out there that has the similar problem :mj: . I think I noticed viibrations from my car after installing the 4 pound lower pulley :nonono: . My 04 cobra only has 5000 miles on it :dw: . At 50 MPH or more the rear view mirror vibrates enough to give me a headache and the passenger seat wobbles a bit too :cryying: . I thought that maybe my driveshaft needed indexing or rebalancing. I think I will have Ford take a look at the driveshaft first :idea: . Afterwords I might take apart the lower pulley and re-assemble it. But does anyone know if the lower pulley can cause bad vibes? I think it was installed properly. It shredded 3 belts on me at first, and then I put the lower idler in the upper slot position on the T-plate (recommended in the instructions)and a 3.2 Metco alt pulley while I was at it, and correct belt and it solved the shredding belt problem. Any ideas why there is so much bad vibration? Where did all the mustang gurus go?!! :beer:
 

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