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Reload this Page Pulsing/Beating vibration over 70mph....cant figure it out??

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Old 08-22-2005, 03:26 PM   #1
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Car: 1989 Iroc-Z
Engine: 350ci SBC
Transmission: 700R4

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Pulsing/Beating vibration over 70mph....cant figure it out??
I have this vibration that pulses about1-2 times a second going over 70mph. It shakes the whole car and seems to be comming from the rear. I had the wheels and tires balanced as well as the driveshaft balance checked with no change. I then had a new drive shaft made and they reused the old yoke had new u-joints installed and the whole thing was balanced....the vibration is still there. Any help???
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Old 08-22-2005, 04:20 PM   #2
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Sounds like the problem I'm having... check out this post:

http://thirdgen.org/techbb2/showthre...hreadid=305297
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Old 08-22-2005, 04:23 PM   #3
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Car: 1989 Iroc-Z
Engine: 350ci SBC
Transmission: 700R4

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Mine doesnt constantly vibrate...its mostly like an on off quick pulse vibration that beats faster the faster you go.
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Old 06-07-2007, 03:06 PM   #4
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Re: Pulsing/Beating vibration over 70mph....cant figure it out??
I know it was a long time ago, but I found this on searching and was wondering what the problem turned out to be?
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Reload this Page Pulsing/Beating vibration over 70mph....cant figure it out??
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