Describe the sound.
Clicking Light, sharp noise. Usually related to engine or vehicle speed.
Clunking Random thumping or pounding sound.
Knocking Rhythmic Pounding
Pinging High-pitched metallic tapping sound.
Screeching High pitched piercing metallic sound
Squealing Loud shrill, sharp, noise related to engine speed.
Scraping, thud growl.
Get someone else to listen and describe the sound and where it's coming from.