the car only does it after its warmed up, and the warmer the more it does it, for example if i'm on the highway for a while when i get off its really bad. It vibrates or kinda wobbles mostly between 3-4k rmps and smooths out when above 5k or in Vtec. I've replaced both axles twice, replaced the halfshaft the crankpulley my tires and still have not figured it out. Any ideas? thanks

 

do you have aftermarket rims on the car if so look at the hub cemetric rings and have you replaced the motor mounts?

 

yes i do, not sure what the hub semetric rings are though? yeah all mounts are new also.

 

this explains it alittle: http://www.miata.net/garage/hubcentric.html
and try searching hub centric rings.

 

i'll take off a wheel and see but i've had these rims for several years and never had any problems.

 

any other suggestions, this is driving me nuts. I want to turbo this car but i'm not going to if i cant figure this out.

 

what kinda mounts are you using? does it do this when the car is not moving? does it make a differance if you are turning? try pulling up on the intake manifold, see if you can rock the motor. had this happen on an eclipse and it turned out that the rear mount bracket had snapped in half.

 

i installed new oem type r mounts less than a year ago, it does in only under load between 2-5k most at 3-4k, if i just rev up the motor theres no apparent shaking.

 

did you just out a new exaust on it? make sure it is not touching anything could be an exhaust rattle under a load when the motor moves or your motor mounts could be loose.

 

i've got a stock ITR exhaust on there now, i'll look to see if my mounts are ok, somehow i think that its from the suspension though, i'm still tempted to get new axles again becuase i've been using NAPA's and i dont trust they too much.