Noise and Vibration Analysis

Noise and Vibration Analysis

A noise or vibration that is noticeable when the vehicle is in motion MAY NOT be the result of the transmission. Refer to the General Information Diagnostic Starting Point - Vibration Diagnosis and Correction procedure. Diagnostic Starting Point - Vibration Diagnosis and Correction

If noise or vibration is noticeable in PARK and NEUTRAL with the engine at idle, but is less noticeable as RPM increases, the vibration may be a result of poor engine performance.

^ Vibration may also be caused by a small amount of water inside the converter.
^ Inspect the engine and transmission mounts for damage and loose bolts.
^ Inspect the transmission case mounting holes for the following conditions:
- Missing bolts, nuts, and studs
- Stripped threads
- Cracks
^ Inspect the flywheel for the following conditions:
- Missing or loose bolts
- Cracks
- Imbalance
^ Inspect the torque converter for the following conditions:
- Missing or loose bolts or lugs
- Missing or loose balance weights
- Imbalance caused by heat distortion or fluid contamination
^ If the noise or vibration is noticeable in PARK and NEUTRAL with the engine at idle, but is more noticeable as RPM increases, the vibration may be an engine imbalance or a transmission imbalance. Refer to Torque Converter Diagnosis. Torque Converter Diagnosis