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11-09-2008, 07:38 PM
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#1 |
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It'll buff out
Join Date: Mar 2008
Location: Blanchard,Ok
Posts: 1,376
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Weird and Loud vibration please help
Ok my truck has a really loud and annoying vibration when i get my truck at about 2500 rpms and stops at 4000 rpms. Its not my tire balance or alignment cause it does it when it's in park revving it up. I replaced my rear U-joint but not my front so it might be that or Someone said it could be my flywheel.
Anybody else having this? Last edited by allen123; 11-09-2008 at 07:39 PM. |
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11-09-2008, 07:42 PM
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#2 |
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Senior Member
 
Join Date: Oct 2005
Location: south carolina
Posts: 658
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Re: Weird and Loud vibration please help
Flywheel, bent fan blade, or harmonic balancer
__________________
1972 chevy cheyenne 10,nothing special at the moment,Its a work in progress, Working on the engine, paint and body,engine, paint and body,now its the suspenion, ahh hell I'm about tired of working on it. Maybe it will be a rat rod. 
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11-09-2008, 07:43 PM
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#3 |
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Active Member
Join Date: Oct 2006
Location: Ohio
Posts: 1,643
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Re: Weird and Loud vibration please help
2nd all the above
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1968 SWB 454 + .040, 490HP x 540 FT pounds of Torque 10-1 Kb Forged pistons, recon rods w/ ARP wave loc bolts 781 heads Ported with 2.19/1.88 SSTvalves Lunati 60204 cam, Micro Trol lifters, Ported Edelbrock Performer Rpm manifold armor coated, Pertronix Triple Strike Ignition Holley 770 Street Avenger carb,Headers armor coated Built by Watson Ruppel Performance in Sarahsville Ohio. Hardshift Tranny Built Turbo 350,TSI 10" 3000 stall 12 Bolt Eaton Posi 4.10 Richmond Gears moser axles  18.5" x 31" Hoosier Pro Street Radials  ET Classic 5 Wheels - polished Power Steering, Power Brakes,Disc Brakes,Tach & Gauge Dash, Tilt,Factory Air (gone) Custom Paint & Body Work Special thanks to my wife, my son and my money tree 
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11-09-2008, 07:45 PM
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#4 |
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Registered User
Join Date: Oct 2006
Location: bridgecreek ok.
Posts: 1,214
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Re: Weird and Loud vibration please help
if you're stopped and it's doing it, it's not the ujoints. If its a flywheel it will sound like a rod knocking. Could be a harmonic balancer.
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11-09-2008, 07:50 PM
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#5 |
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It'll buff out
Join Date: Mar 2008
Location: Blanchard,Ok
Posts: 1,376
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Re: Weird and Loud vibration please help
alright thanks
I already replaced the harmonic balancer It could be the fan blade cause its pretty roughed up But im not sure if it would make that big of a vibration cause its a pretty rough vibration And its been doing it since i got the truck and my flywheel just started clicking like that yesterday |
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11-09-2008, 07:57 PM
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#6 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Re: Weird and Loud vibration please help
what engine does it have?
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11-09-2008, 11:12 PM
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#8 |
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Registered User
Join Date: Mar 2003
Location: Hamburg Pa
Posts: 1,153
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Re: Weird and Loud vibration please help
check the flywheel for cracks and convertor bolts
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I don't do thing cuz I can, I do it cuz someone told me it couldn't be done... |
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11-09-2008, 11:28 PM
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#9 |
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It'll buff out
Join Date: Mar 2008
Location: Blanchard,Ok
Posts: 1,376
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Re: Weird and Loud vibration please help
Ok thanks
Well took the fan off earlier to see if it was it and its not the fan, So i guess it leaves it to the flywheel my dad is going to be home tomorrow so we'll prob take it off and look at it. |
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11-11-2008, 09:37 AM
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#10 |
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Registered User
Join Date: May 2007
Location: Emporia, kansas
Posts: 300
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Re: Weird and Loud vibration please help
did this just start? Did it start after changing anything? I had the same problem and did all the same things you did. It was the flywheel. Is it a 400 flywheel? Have you lowered or altered stance and changed pinion angle? Again the big ? is when did it start. Gary
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11-11-2008, 09:40 AM
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#11 |
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Registered User
Join Date: May 2007
Location: Emporia, kansas
Posts: 300
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Re: Weird and Loud vibration please help
does it shudder at any speed. I bet it is the flywheel, cracked or not a 350 flywheel
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11-11-2008, 10:35 AM
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#12 | |
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Senior Member
 
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,237
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Re: Weird and Loud vibration please help
Quote:
__________________
David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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11-11-2008, 12:01 PM
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#13 |
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I wish I was a cowboy
Join Date: Apr 2008
Location: Rohnert Park, CA
Posts: 409
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Re: Weird and Loud vibration please help
I third (or fourth?) the flexplate. They crack, they warp in high temps, the bolts take a huge beating every day. If it's at particular rpm, it's likely not crank/rod/pistons. So you only have balancer/pulleys/fan/flexplate left...
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-Kris Met list: Cyclone,Wilson,TranzAm,extd56,hotrodhomi,mnky30,Rokcrln,Brad,JerryJones(well, his truck anyway). |
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11-11-2008, 12:10 PM
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#14 | |
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It'll buff out
Join Date: Mar 2008
Location: Blanchard,Ok
Posts: 1,376
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Re: Weird and Loud vibration please help
Quote:
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