1999 Mustang GT Vibration in 3rd gear around 80km/h - Ford Mustang Forum
 
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post #1 of 7 (permalink) Old 03-22-2011 Thread Starter
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1999 Mustang GT Vibration in 3rd gear around 80km/h

Hey there so i just bought a 1999 Mustang gt and i got a really good deal on it. I was driving it the other day and i noticed a vibration around 80km/h when i had the gas on it felt like it was coming from the right rear side of the vehicle. It went away when i took my foot of the gas and came again when i went back on the gas. I was thinking rear end? or maybe driveshaft thanks.

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post #2 of 7 (permalink) Old 03-22-2011
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Tire needs balanced, or they may not be rated for high speeds. Drive shaft will act up between 45-55 mph with a real bad vibration then settle down about 60 mph. Keep in mind if those tires were burnt out with they tend to build up high low spots of rubber and will cause nasty shaking as well.

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post #3 of 7 (permalink) Old 03-22-2011
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Forgot one important factor. If anyone happened to use fix a flat in any of those tires, then you will get a really unbalanced tire. Fix a flat is good for emergency use only, and should be removed from a tire asap.
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post #4 of 7 (permalink) Old 03-22-2011 Thread Starter
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Thanks im not sure if its the tire and it does smooth out at higher speeds and it only happens when i have my my foot on the gas pedal when i take it off it goes away and when i put it back on it comes back it happens in 3rd gear
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post #5 of 7 (permalink) Old 03-22-2011
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^Sounds like a tire out of balance. Check that first. I think a u-joint on it's way out can cause vibration as well.


2001 GT Convertible
/1967 Coupe
All the usual bolt-on's /200 I6, C4

And a few Explorers too... 2008 4.0 XLT 4x2, 1996 XLT 5.0 4x2, 2003 Sport Trac XLT 4.0 4x4
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post #6 of 7 (permalink) Old 03-23-2011
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agreed SoCal....always check the simple things first.
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post #7 of 7 (permalink) Old 03-24-2011 Thread Starter
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Thanks guys will do that this weekend
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