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Driveline Rotational Speed Calculation

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
  1. Determine the first order rotational speed of the driveline - transmission output shaft/rear axle pinion gear - in revolutions per second (Hz), based on the first-order rotational speed of the tire/wheel assemblies and the drive axle ratio. 13 Hz X 3.42 drive axle ratio = 44.46 Hz, rounded to 44 Hz first-order driveline rotation related.
  2. Compare the rotational speed of the driveline - transmission output shaft/rear axle pinion gear - at the specific vehicle speed at which the disturbance occurs, to the dominant frequency recorded on the J 38792-A during testing. If the frequencies match, then a first-order disturbance related to the rotation of the driveline - transmission output shaft/rear axle pinion gear - is present.
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