2004 cobra vert vibrations

[98cobra]

Hey i need help!! I have been a mustang owner for years and I purchased a 2004 cobra convertable with 6400 miles on it in May. the car bringing it home from new york had a bad vibration at 60 and up. owner said probably flat spot and he would pay for tires. Once home we discovered possible previous damage to the front end. lamatta performance here in Orlando has exausted efforts to find it??? We have first check frame it is straight put new springs,shocks,front control arms, new cat back,strut tower brace,full length sub frame connectors, alinment, new tires,changed wheels from one that was ok,rebalanced drivshaft and swaped out the intire IRS from a donan car and no change??? The car drives straight as an arrow and has very slight vib at 58 to 60 and at 62 to 68 shacks you brains out and then settles out at 70 to mild vib until 80 and then is not to noticable. Please if you have any ideas let me know. thanks for your help Cobra98

[SteedaSteve]

Did you check the tire balance?

[98cobra]

Yes first thing we did and I even bought new BFG's and rebalanced the original goodyears . I even took wheels and tires off the 98 cobra we have that drives fine put them on the 04 no change.

[SteedaSteve]

check your pinion angle, motor and transmission mounts. That's all I can think off right now.

[reign16]

If i were you i will be check to the person or the mechanic for the good!




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