1999 K1500 Suburban Drivetrain Rattle

Tugzy · June 27, 2005

Hi, my 1999 Suburban K1500 w/3.43 gears has a tin canny rattle sound in the drivetrain. I really hear it when im driving slow and slowing down for a stoplight/sign and windows are down. The sound is speed dependant. Can someone help? What could it be?

Thanks

99-2door · June 28, 2005

Wow a 4x4 burb with 3.42s, or is that 3.73??

Could be one of the cats has broken down inside or maybe you have a loose exhuast heat shield.

Tugzy · June 28, 2005

Yeah 3.42's...the rattle is consistant when the wheels are turning. Nothing at idle so i dont think its a heat shield but rather drivetrain related. What are the symptoms of a u joint going bad?

willieboy · June 28, 2005

Sounds like a timing chain to me. Dodge 3.9l are notorious for timing chain clatter exactly as you described.

405landlord · June 28, 2005

Do the wheels have to be turning to hear the noise or can you produce the noise by just revving the engine? I had a loud rattling noise on my 03 Suburban with 6.0 and it turned out to be the A/C compressor going south. Good luck.