rattling and clanking under truck at 35 45 mph

jayrock77 · 05-18-2012, 10:08 PM

hi i have a 05 chevy colorado z71 with 180k and still running strong ! in the last 3 weeks i have noticed something rattling or clanking undr the truck sounds like its coming from under the passenger side more . also i noticed it starts wen im slowing down and driving at a steady speed of 35 45 mph ??? i have gotten under truck i took most of heat shields off and i took off heat shield on manifold .i shook the and hit the ehxaust and heard nothing ? i have nerf bars on but they feel solid . i just cant find it ! help

????

GregDAP · 05-18-2012, 10:23 PM

Drive shaft, U joints???

jayrock77 · 05-18-2012, 11:12 PM

ya i tried to shake the drive line it feels solid but ?? i dont no

vettegofast · 05-19-2012, 11:15 AM

does the frequency of the clank increase with speed or RPM? do you have a 4x4? I was thinking of CV shafts or wheel bearings.

Old Retiree · 05-19-2012, 05:47 PM

Sounds like baffles in the converter, mine did that and finally came loose on a trip and chocked the engine down to a crawl, had to replace the converter. I think there is a recall up to 85,000 miles mine had to many to in the recall.

jayrock77 · 05-19-2012, 11:30 PM

ya its a 4x4 z71 with 180k motor runs good and trani feels good.the noise reminds me of something like a rock rolling around ontop of heat shield but i took most of shields off ? i dont how els to tell you haha .. at 35 45 mph i can hear a steady vibrating sound ? then wen i slow down some it goes away . then wen i hit the gas nothing until i stay at 45 50 somtimes i can can hear it on freeway ?? thank for the all the help guys !

vettegofast · 05-24-2012, 08:57 AM

might have to put the truck on a lift or jack stands and try to pinpoint it. I did that when my Saturn Vue wheel bearing was going out.

jayrock77 · 06-24-2012, 07:10 PM

ya im going to have to do that its still making noises . thanks everyone for your support.

login · 06-25-2012, 09:18 AM

I second the catalytic converter mine went out also and what you describe sounds a lot like it.

jayrock77 · 08-05-2012, 06:39 PM

so i have been told by a few people that its my catylatic converter . so how much is one and how much to have one put in ?? im thinking about just cutting the whole works off just a pipe with a muffler . i dont have to deq .

05-18-2012, 10:08 PM	#1 (permalink)
jayrock77 Member Join Date: Jul 2010 Location: washington state Posts: 35	rattling and clanking under truck at 35 45 mph hi i have a 05 chevy colorado z71 with 180k and still running strong ! in the last 3 weeks i have noticed something rattling or clanking undr the truck sounds like its coming from under the passenger side more . also i noticed it starts wen im slowing down and driving at a steady speed of 35 45 mph ??? i have gotten under truck i took most of heat shields off and i took off heat shield on manifold .i shook the and hit the ehxaust and heard nothing ? i have nerf bars on but they feel solid . i just cant find it ! help ????

05-18-2012, 10:23 PM	#2 (permalink)
GregDAP Senior Member Join Date: Jun 2011 Location: Colton, CA Posts: 2,011	Drive shaft, U joints??? __________________ 2011 Colorado CC Z71 2LT 4X4 3.7L 3.73 gears/Snuglid/MBRP muffler/K&N Air Filter/Air Doc intake/Supermod PTB/SuperSparks/Z71 decals removed/4" Rancho Lift/Rancho RS5000series/ProComp 17" Alloys/285 70 17 Goodyear Duratracs/5000k HID lows and fogs/LED DRLs,tails,reverse lights/Super 2nd apply servo/tanny cooler/PCM tuned by Justin @ Black Bear Performance/Off road club #3/Lifted Club #440

05-19-2012, 11:15 AM	#4 (permalink)
vettegofast Senior Member Join Date: Jun 2005 Location: Lafayette, LA Posts: 1,061	does the frequency of the clank increase with speed or RPM? do you have a 4x4? I was thinking of CV shafts or wheel bearings. __________________ 2005 Colorado LS Z71 2WD Crew Cab 1984 Corvette Project - 425HP/425ftlbs TQ Last edited by vettegofast; 05-24-2012 at 08:55 AM.

05-19-2012, 05:47 PM	#5 (permalink)
Old Retiree Junior Member Join Date: Feb 2007 Location: Eutawville, South Carolina Posts: 29	Sounds like baffles in the converter, mine did that and finally came loose on a trip and chocked the engine down to a crawl, had to replace the converter. I think there is a recall up to 85,000 miles mine had to many to in the recall. __________________ Don Crawford

05-24-2012, 08:57 AM	#7 (permalink)
vettegofast Senior Member Join Date: Jun 2005 Location: Lafayette, LA Posts: 1,061	might have to put the truck on a lift or jack stands and try to pinpoint it. I did that when my Saturn Vue wheel bearing was going out. __________________ 2005 Colorado LS Z71 2WD Crew Cab 1984 Corvette Project - 425HP/425ftlbs TQ

05-18-2012, 11:12 PM	#3 (permalink)
jayrock77 Member Join Date: Jul 2010 Location: washington state Posts: 35	ya i tried to shake the drive line it feels solid but ?? i dont no

05-19-2012, 11:30 PM	#6 (permalink)
jayrock77 Member Join Date: Jul 2010 Location: washington state Posts: 35	ya its a 4x4 z71 with 180k motor runs good and trani feels good.the noise reminds me of something like a rock rolling around ontop of heat shield but i took most of shields off ? i dont how els to tell you haha .. at 35 45 mph i can hear a steady vibrating sound ? then wen i slow down some it goes away . then wen i hit the gas nothing until i stay at 45 50 somtimes i can can hear it on freeway ?? thank for the all the help guys !

06-24-2012, 07:10 PM	#8 (permalink)
jayrock77 Member Join Date: Jul 2010 Location: washington state Posts: 35	ya im going to have to do that its still making noises . thanks everyone for your support.

06-25-2012, 09:18 AM	#9 (permalink)
login Member Join Date: Feb 2009 Location: Ottawa Ontario Canada Posts: 50	I second the catalytic converter mine went out also and what you describe sounds a lot like it. __________________ 04 Colorado crew 2wd Michelin ltx2 Advance folding cover

08-05-2012, 06:39 PM	#10 (permalink)
jayrock77 Member Join Date: Jul 2010 Location: washington state Posts: 35	converter ?? so i have been told by a few people that its my catylatic converter . so how much is one and how much to have one put in ?? im thinking about just cutting the whole works off just a pipe with a muffler . i dont have to deq .

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