LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> General Information >> OEM General Information >> Vibration - Drivetrain >> Diagnostic Starting Point >> Component Rotational Speed Calculation >> Driveline Rotational Speed Calculation

Driveline Rotational Speed Calculation

  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 Electronic Vibration Analyzer (EVA) 2 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.
scientia non olet · About LEMON Manuals