Crickets Under My Truck

[Chris Dubya]

Morning guys,

 

Here's the skinny. VHO, 138K miles, stock rims. New shocks 20K ago, new front bearing assembly 5K ago.

 

I've had this annoying rattle coming from under the truck for quite some time now, sounds like crickets chirping, had it even before the front bearing swap. I've hit the lugs with silicone lube, but no go. I can't hear anything over 30mph due to the magnaflow, but around town it's really noisy (especially on the sh*t streets in my little town).

 

The noise does not slow down as I slow down, so I've ruled out anything transmission or bearing wise, I'm suspecting suspension or lugs.

 

 

Any experience with this? Any ideas or solutions would be greatly appreciated.

 

Thanks in advance,

 

C~Dub

[Fireman31]

Is it a constant rattle? Or a rattle with bumps in the road? Does your truck still have the original cats?

[kcsilveradoss]

you are contradicting yourself....is it a rattle, or a squeak (crickets chirping). my truck used to make a squeak from rear over small bumps in road,...turned out to be the individual leaf springs rubbing against each other. get a big bottle of anti-seize and paste it between leaves.

 

shaun

[Chris Dubya]

Fireman, yes original cats.

 

KC, somewhat of a contradiction, but also both. It is a very small rattle that produces a cricket chirping noise.

 

Mid morning update....I was driving down the same bumpy street, hardly a peep from under the truck. Ran into a body shop buddy of mine and got his 2 cents. He suggested hangers on my exhaust. That would make sense because IMO they would have more play hot (last night - long drive - hot exhaust - very loud noise) as opposed to this morning (short drive - cool exhaust - no noise).

 

FWIW I'm dumped right behind my magnaflow.

 

Fireman, are you thinking I should replace the cats, or is there some way I can A&M them to quiet them down.

 

Thanks guys

[Fireman31]

Fireman, yes original cats.

 

KC, somewhat of a contradiction, but also both. It is a very small rattle that produces a cricket chirping noise.

 

Mid morning update....I was driving down the same bumpy street, hardly a peep from under the truck. Ran into a body shop buddy of mine and got his 2 cents. He suggested hangers on my exhaust. That would make sense because IMO they would have more play hot (last night - long drive - hot exhaust - very loud noise) as opposed to this morning (short drive - cool exhaust - no noise).

 

FWIW I'm dumped right behind my magnaflow.

 

Fireman, are you thinking I should replace the cats, or is there some way I can A&M them to quiet them down.

 

Thanks guys

 

It's a possibilty based on what you are saying........a little test for you.......crawl under the truck and wrap on each cat with a closed fist(when cold of course), if you hear a rattle inside the cat, it is coming apart internally and should be replaced, gutted, or removed totally.....let us know what you find....

[alex.t]

might as well check your whole exhaust while your under there (muffler,hangers)

[Chris Dubya]

let us know what you find....

 

Will do. I'm getting my inspection Mon or Tuesday. Since it will be 13 months until the next one, I may throw on some long-tubes....always wanted headers. If I do go the header route, would you guys recommend running no cats (until next inspection) or going ahead and installing new ones behind the headers?

[Chris Dubya]

Found it!! Had to get new tires in order to pass inspection, while on the lift, banged my entire exhaust system from manifold back. The hanger on my muffler is the culprit! Thanks for your input guys, really appreciate it!

 

C~Dub