What is the metal to metal kicking sound under my truck

2008 SAAB 9-7X
212,032 MILES • 2WD • AUTOMATIC
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2GROSSMYAG
  • MEMBER
  • 1 POST
When I start to accelerate and get up to 20 miles per hour I start to hear a loud metal to metal knocking noise that sounds like something lose and hitting the ground.
May 26, 2021 at 12:41 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

That's a tough one without hearing it. Is it loud enough for you to record and upload for me to hear?

Also, take a look under the vehicle. Take a rubber mallet and tap on the exhaust system and see if you can recreate the sound.

When driving, pay attention to if there is something that changes the sound. For example, does pressing the brakes make it change pitch? Does leaving off the throttle change it?

Also, take a look through this link. It discusses noises from the suspension and drivetrain. See if anything helps.

https://www.2carpros.com/articles/popping-noise

Again, if possible, record it and upload it for me to hear.

Take care,

Joe
May 26, 2021 at 8:25 PM
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