Defective kyb = vibration 60-70mph? - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 05-14-2010, 05:01 PM   #21
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Is it possible that a front and rear shock were switched?
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Old 05-14-2010, 10:50 PM   #22
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I will work on the car tomorrow and post some pics of the F/Right coilover setup.
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Old 05-15-2010, 04:11 AM   #23
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Bent shock shaft?
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Old 05-15-2010, 04:47 PM   #24
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The shimmy went away on my '99 when I put on the Konis.

I also have a '91 with 188k miles and AFAIK original, basically non-functional shocks. Couldn't even drive it at 65-70 on the highway. Got the wheels balanced properly (no need for road force, just round wheels and tires and a proper dynamic balance) and it's rock-solid at all speeds.
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Old 05-16-2010, 07:57 PM   #25
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Originally Posted by jacob300zx View Post
Bent shock shaft?
I bought a new one on ebay this morning. I'll post after installed to see if it fixed problems.
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Old 05-16-2010, 08:04 PM   #26
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Quote:
Originally Posted by gospeed81 View Post
You'll probably have more luck at miata.net, since it affects almost every miata.

You need a good balance on your tires if you don't want to drive a paint shacker.
I have had my tires rebalanced like 3 times and still I have a shake at anything above 65ish. I wonder if it would have anything to do with only putting weights on the back of the wheel. I doubt it. I'm pretty sure it doesn't have anything to do with the 65mph shimmy though, since I have had it running smooth before with zero shake. So to the OP, just have the wheels balanced by someone who really takes their time to do it right, and has good equipment, and it may be OK.

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Old 05-16-2010, 11:07 PM   #27
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Tierod? Wheel bearing?
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Old 05-17-2010, 08:01 AM   #28
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I just had to replace a rear brake rotor for this problem.

No pedal pulsing and multiple wheel balance attempts did not fix it. It took a trip to the dyno where I saw the driver's side rear wheel wobbling to find this.
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Old 05-20-2010, 02:14 PM   #29
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Quote:
Originally Posted by jacob300zx View Post
Tierod? Wheel bearing?
+1, any howl with the vibration?
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Old 05-20-2010, 05:35 PM   #30
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Quote:
Originally Posted by luiml73 View Post
I bought a new one on ebay this morning. I'll post after installed to see if it fixed problems.
I was under the impression kyb's have lifetime warranties? I know you're not the orginal purchaser but most decent autoparts stores will help you out anyways (costs them very little, encourages you to return to them for other parts)
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Old 05-20-2010, 10:44 PM   #31
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Originally Posted by Braineack View Post
is the sleeve taller than the shock body? They must be shortened if so. I have a feeling the body is riding on the sleeve...
I think you where right. The rear was flush, but the front sleeve was way taller(1"). It looks like the front sleeves are taller then the rears.



I raised the car about 1" on all sides, but the passenger front still sits 1/2" taller then all the other sides. Must be something wrong with that shock/shaft. Anyways the car rides much better now even though it doesn't look as nice anymore, but it will have to do untill my Vmaxx's arrive from FM.

Raised

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Old 05-24-2010, 07:00 PM   #32
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I've been chasing a vibration at 70 for months now. good luck.
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Old 05-24-2010, 08:57 PM   #33
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You need to cut those massive bump stops down. Even threads everywhere is no way to go, just raise until even for now.
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Old 05-25-2010, 12:06 AM   #34
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Quote:
Originally Posted by NA6C-Guy View Post
I have had my tires rebalanced like 3 times and still I have a shake at anything above 65ish. I wonder if it would have anything to do with only putting weights on the back of the wheel. I doubt it.
Stop doubting it. Take your wheels off, use a good wheel cleaner like Eagle One to get all the dust off the inside, then take them to a place that uses tape weights to do a proper dynamic balance. The weight on the inside only takes out the hop, not the wobble.
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