Stange undercarriage crackle...

[sonorakitch]

Hello all,



I have been noticing lately a strange "crackle"-like sound coming from underneath my truck lately. It only happens around 1800 RPM or so, and generally when I am dethrottling coming up to a stoplight or something. I thought at first it could be an exhaust rattle, but I am questioning that now. It almost seems to be getting worse. Any thoughts?



Thanks in advance,



~Chris

 

[KYOUNG]

CRACKLING

MY TRUCK MADE SIMILAR SOUNDS,THE FLOOR IN THE BED WAS CRACKING UP FRONT

 

[Andy Redmond]

You might ck. out the Fritz site for some tsb's and fixes. It seem the bed cracking and mounts caused these symtoms. I think some loose baffles in mufflers caused this complaint as well.



Good luck.

 

[sonorakitch]

Thanks to the both of you.



I have checked out the bed pretty well... doesn't seem to be the problem. The sound doesn't make me think of that though... it is a reliable crackling, almost a buzzing sound from underneath--only at around 1800rpm at de-throttle. I suspect it could be the baffles... I will check that out too.



It reminds me of a catalytic converter rattling noise, but mine has been hollowed out. Don't understand it.



Thanks, I will check out the Fritz site.



~Chris