Engine rattle?

[Sanford_yee]

Hope someone can help diagnose this issue. Search didn't give me any results.

I hear a rattle from the rear after lifting my foot off the gas. The noise happens at about 1800 rpms and slowly quiets down with rpm. If I get back on the gas it goes away. If I engage the clutch or neutral, it goes away. I hear it predominately in 1st gear when in the parking lot.

Has anyone experienced this before? Where to begin to look?

Thanks!

[shadrach74]

Check the heat sheilds on the exhaust. They're likely loose...

[nieuwhzn]

Also check the heat shields just before the secondary cats.
I just whacked mine with a hammer today. Nasty rattle that's been there for 2 years (!) is gone now.
These heat shields are just the dumbest design ever. Basically they are just a sleeve over the pipe. Nothing holds them in place and over the years they just get looser and looser.

[tonycarreon]

i thought i had a rattling heat shield a few years ago, turned out the alternator bolt was loose. i tightened it up and rattle was gone.