GTman Posted May 5, 2006 Share Posted May 5, 2006 Just wondering if this is normal? My 2004 K12GT has this increased vibration in the range of 4200 to around 4800 RPM. I feels like engine vibration. It's just in that RPM range regardless of what gear it's in. It has been this way since new. I figured it was just some resonant frequency. My curiosity is up now because the rear transmission seal started leaking around 17,000 miles. It was replaced at 24,000 but is still leaking at 27,000 miles. The SM at the dealer has suggested that BMW will only guarantee that the seals will hold back BMW oil so I'm going to put some of that in and take it in before my warranty is gone. The engine and rear drive seals aren't having any problem holding in the Amsoil. Link to comment
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