Automotive Technology/Diagnostics
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Listen to driver concern and road test the vehicle, every time.
Vibration, Harshness, and Noise
[edit | edit source]Always begin at the tires look for uneven wear.
Transmission Vibration and Noise
[edit | edit source]Vibration
[edit | edit source]Transmission and torque converter are not usual culprits for vibration. Check brakes , bearings, joints first.
When it is the culprit, usually it's an unbalanced/poorly mounted torque converter or faulty output shaft.
Noise
[edit | edit source]Should be directly connected to speed and conditions
Any condition with engine running points to the oil pump.
Noises based in a single gears relate to a band or clutch problem.