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Speedometer Surging

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Old Nov 29, 2010 | 12:59 PM
  #1  
85IROCzzz's Avatar
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From: Phoenix, AZ
Car: 91 Z28
Engine: 350 TPI
Transmission: 700R4
Speedometer Surging

Not sure if this is the right section but whatever, my speedometer seems to surge + or - 5 MPH while I'm driving and its pretty annoying. Anybody know why it does this and how I can fix it?

Video ( I'm pretty sure I'm really going 75 steady)
http://img139.imageshack.us/img139/6339/fg2.mp4
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Old Nov 29, 2010 | 01:17 PM
  #2  
JamesC's Avatar
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Speedometer Surging

Very possibly the speedo head (I had a 140 that did exactly the same thing), but there are other possibilities:

https://www.thirdgen.org/forums/inte...eedo-woes.html

JamesC
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