5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Rear Gear ?

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Old 02-29-2008, 05:48 PM
  #1  
87Stallion
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Default Rear Gear ?

Is there anyway to tell what rear gear ratio you have by the MPH and RPM. I have no idea what gear the guy put in the car before me.
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Old 02-29-2008, 05:56 PM
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ACE
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Default RE: Rear Gear ?

jack your car up
put it in neutral
Put a line on your tire and one on your driveshaft
Count how many times your driveshaft goes around to one revolution of your tire.

3 revolutions=3.08
3 and a half revolutions=3.55
3 and 3/4s revolutions= 3.73
a little over 4 revolutions=4.10
4 and a half revolutions=4.56s
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Old 02-29-2008, 06:09 PM
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87Stallion
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Default RE: Rear Gear ?

Thanks, I will try that.
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