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2003 Porsche 911 Cab. 56k miles. Looking for guidance and / or ideas to resolve a slight front end wheel shimmy problem when traveling above 70 MPH and slight pulling/fading to the right. I purchase this car 3 months ago from a local Porsche dealership. Dealership has acknowledged this shimmy and they have been accommodating but they have not been able to resolve the problem. Car has new Continental 225/40 ZR 18 92 YMS on front and 285/30 ZR18 93 YMS on rear. Just recently had wheels Hunter Road Force balanced with left front at 12 lbs, right front at 5 lbs, left rear at 7 lbs and right rear at 21 lbs. Also had aligned; left front camber .08 & .05 toe, right front camber .14 & .08 toe, front total camber -.07 and toe .13. Rear left -1.34 camber and .22 toe, right rear camber -1.15 and toe .24. Total rear toe at .46 and thrust angle -.01. All other allighnment data is “……”. Dealer identified right rear wheel was bent and was sent out for repair and reinstalled before above adjustments. Dealer also substituted a complete set of balanced donor rims and tires to rule out issues, but car continued to have shimmy and fading with donor set.
 

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2003 Porsche 911 Cab. 56k miles. Looking for guidance and / or ideas to resolve a slight front end wheel shimmy problem when traveling above 70 MPH and slight pulling/fading to the right. I purchase this car 3 months ago from a local Porsche dealership. Dealership has acknowledged this shimmy and they have been accommodating but they have not been able to resolve the problem. Car has new Continental 225/40 ZR 18 92 YMS on front and 285/30 ZR18 93 YMS on rear. Just recently had wheels Hunter Road Force balanced with left front at 12 lbs, right front at 5 lbs, left rear at 7 lbs and right rear at 21 lbs. Also had aligned; left front camber .08 & .05 toe, right front camber .14 & .08 toe, front total camber -.07 and toe .13. Rear left -1.34 camber and .22 toe, right rear camber -1.15 and toe .24. Total rear toe at .46 and thrust angle -.01. All other allighnment data is “……”. Dealer identified right rear wheel was bent and was sent out for repair and reinstalled before above adjustments. Dealer also substituted a complete set of balanced donor rims and tires to rule out issues, but car continued to have shimmy and fading with donor set.
Congrats on your 'new' 911. I just got a '99 / 911. I don't have any shimmy or shake, but it's still an older car. One of the things I'm going to replace right away is wheel bearings - ya might check that. And you might have your dealer check to make sure there isn't any frame damage. Good luck!!
 
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