1999 GMC Sierra metallic popping noise in 4X4

Tiny
METZA1
  • MEMBER
  • 1999 GMC SIERRA
  • V8
  • 4WD
  • AUTOMATIC
  • 135,000 MILES
When I have my truck in 4 wheel drive (4-lo or 4-hi) and I accelerate quickly or I’m putting a lot of torque on the vehicle, there is a loud metallic popping noise. It sounds like its coming from the front end, but I’m not 100% sure. During normal driving (straight or turning left or right) there is no noise.
Wednesday, May 20th, 2009 AT 8:56 PM

1 Reply

Tiny
DR LOOT
  • MECHANIC
  • 2,311 POSTS
It is obvious its coming from the drivetrain, check all of your u-joints including the front axle, and make sure you check your mounts like your transmission and transfer case, and check your engine mounts while you're at it, any other questions let me know check all of your u-joints including the front axle, and make sure you check your mounts like your transmission and transfer case, and check your engine mounts while you're at it, any other questions let me know"
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Wednesday, May 20th, 2009 AT 10:26 PM

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