Yes or no: my '03 Cobra has bad vibration at > 80 mph

[SciFiHiFi]

my grinding sound on startup, head tick and throw out bearing noise are all pretty bad but she's ROCK SOILD all the way into tripple digits!! Stock suspension except for irs bushings and the rear wheels were realigned after half shafts.

 

[cobra12003]

No vibe, some shifter noise

 

[03yellow]

Yes.... I did have it
No......I no longer have it(replaced driveshaft)


Ford parts
http://www.svtperformance.com/forums/showthread.php?t=193978

 

[1Bad04Mystic]

No vibe, but I pretty stock for now...

 

[Redfire Vert 03]

Mine has it bad now, 24,000 miles at 80mph. Taking it in after the holiday to get driveshaft replaced

 

[PowerWheels]

I never go over 80

 

[Sonic Blue GT]

Personally I think the vibration is caused by the tires. I might be mistaken but they are balanced at 55 MPH so I would think that the heat generated by excessive speed would temporarily change the tire structure so as to mae the balancing weights ineffective.

Thoughts?

 

[firemanmike]

Personally I think the vibration is caused by the tires. I might be mistaken but they are balanced at 55 MPH so I would think that the heat generated by excessive speed would temporarily change the tire structure so as to mae the balancing weights ineffective.

Thoughts?

They come with Z rated tires, so with high speed tires I don't think that should be the cause.

 

[Sonic Blue GT]

They come with Z rated tires, so with high speed tires I don't think that should be the cause.

I thought Z rated means the tire can withstand high speed without shedding the cap....it still heats up and can warp while it is rolling. The balance weights would seem not to work entirely correctly then.

 

[Jdaniel]

I just had my new tires put on and rebalanced and the car is PERFECT now! I originally had the stick-on weights and they were flung off. So everything was off balance. Now the car feels brand new!!!