Miata Mailing List: July 1994, Message #177
sponsored by



     


   From: fischman@nynexst.com (Gary Fischman)
Subject: Re: High Speed Vibration
   Date: Fri, 8 Jul 1994 12:04:01 -0400


> 	Does anybody know why my car shakes a lot when it is
> beyond ~85mph? I mean very unstable. Seems like it does have
> an alignment problem; other than that, what else? Any info 
> will be appreciated.

Try (in order)

1) Wheel balance - they *must* be dynamically balanced. The balancing device
   generally has more than 1 setting. Ask them to set it to the most sensitive.

2) Alignment - although this is less likely to cause shake.

3) If its a '90 or '91, get a track bar for $149. It tightens up the rear
   end a bit and supposedly eliminates that kind of shake.

I have a '90 without a track bar. I don't get high speed shaking. But I *did*
have my wheels balanced to the 1% setting.

	...Gary