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#1 |
Registered User
Join Date: Sep 2005
Location: Villa Rica Ga
Posts: 889
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okay. so around 35 i get this pulsing fibration from the truck. its an all over kinda thing so i dont think its a tire /balancing issue(ive already rotated them with no change n the vibration). i pulled the drive shaft and replaced the center u joint(the rear is new an the front seemed to be in good shape.) the hanger baring isnt all that old and also seems to be in good shape. checkd the dope in the diff, and topped it off just for the heck of it.
also when driving, when the vibration starts and i pop it in to neutral, it stops. but. if i rev the engine to a certian rpms(dont know what no tach installed) the vibration will continue. im not sure if this is in the drvie line(driveshaft to rearend) or in the engine or tranny. i checked all fluids and made sure everything was tight(engine, tranny, drive sahft rear end.) so im at a stant still now. ANY IDEAS??.. thanx. w. |
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#2 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: Need Help with vibration.
check your motor and tranny mounts
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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#3 |
Registered User
Join Date: Sep 2005
Location: Villa Rica Ga
Posts: 889
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Re: Need Help with vibration.
check as is replace? i put a wrench on em and gave a hell of a tug. not loose..think i may need new ones? would any thing internally cuase this? any help is greatly appreciated. thanx. w.
Last edited by Premium72; 08-16-2006 at 02:08 PM. |
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#4 |
Registered User
Join Date: Dec 2004
Location: Northern AZ
Posts: 7,271
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Re: Need Help with vibration.
What type of tranny do you have? This could be a motor or tranny thing if it vibrates in nuetral. Did it just start? More info will help us help you.
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#5 |
Senior Member
![]() Join Date: Jul 2005
Location: MISSOURI
Posts: 3,256
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Re: Need Help with vibration.
Found my problem with the fly wheel and clutch disc. Replace both problem went away
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#6 |
Registered User
Join Date: Sep 2005
Location: Villa Rica Ga
Posts: 889
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Re: Need Help with vibration.
its a turbo 350, the problem stops when i bump it in neutral and just coast. but when i rev the motor it vibrates. ill look into the fly wheel issue. thanx. w.
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#7 |
Registered User
Join Date: May 2000
Location: Storm Lake, Ia
Posts: 1,449
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Re: Need Help with vibration.
Had that problem just as you described and for me it was my torque converter was bad.
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#8 | |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
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Re: Need Help with vibration.
Quote:
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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#9 |
Registered User
Join Date: Dec 2004
Location: Northern AZ
Posts: 7,271
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Re: Need Help with vibration.
could be loose bolts on the flywheel, check that first.
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#10 |
Registered User
Join Date: Sep 2005
Location: Villa Rica Ga
Posts: 889
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Re: Need Help with vibration.
cool.. ill look into it later this week.. was playn with it some more today. with the truck i park and given it gas and holdin it at a certian rpm(got no tach not sure what) it just shakes the hell outa the truck.ythis makes me think its sumthn with the motor-tranny or some where in b-tween. .ill play with the torque converter tomorrow or so..thanx fellas you never let me down!!..ROCK ON!!
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#11 |
Registered User
Join Date: Sep 2005
Location: Villa Rica Ga
Posts: 889
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Re: Need Help with vibration.
OK. well i put a wrench on all the bolts to the fly wheel none loose, and gave em all a good tug for the hell of it. put a wrench on every bolt under neath,(engine mounts, tranny mounts, front crossmember, flywheel.) nuthn even lose. im starting to think it maybe my balancer. any thoughts on this? let me know. i may pull this bad boy apart in the next few days and install a new balancer. thanx. w.
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#12 |
Registered User
Join Date: May 2000
Location: Storm Lake, Ia
Posts: 1,449
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Re: Need Help with vibration.
Do you mean the balancer on the front of the engine?
Doesn't really explain why vibration goes away when in neutral then
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#13 |
Registered User
Join Date: Sep 2005
Location: Villa Rica Ga
Posts: 889
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Re: Need Help with vibration.
how doesnt it. when im driving the truck, the vibration starts....ill pop in into neutral, let it coast no vibration. the motor has idled down and not in the same rpm range. it will also do this in park. rev the engine and holding it at the rpm's that vibrate the truck. im going to check more into it in the am. (not tryning to be a smart ass. this is just getting a bit frustrating.....just trying to think clearly and not smash sumthn with a wrench..hahaha. thanx as always. w. )
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#14 |
Registered User
Join Date: Dec 2004
Location: Northern AZ
Posts: 7,271
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Re: Need Help with vibration.
Balancer could be it, it makes the vibration at a certain rpm in gear or in nuetral or park, so it is engine rotating assembly related anything that spins with the crankshaft could be it, if not balancer, I'd really lean to thinking its the converter. It is pain in the ass, but you could pull the tranny and put a new stocker in there (pull the pan and look for metal, as converters usually frag when the do this), if there is metal, then have the tranny gone through. As long as the balancer is there it sould be ok, by the way have you pulled the plugs and run compression? This could be a high speed miss? I do not know if any of these are it, but any of them could be, hope something helps.
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#15 |
Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Re: Need Help with vibration.
Bent fan blade--remove belt and try it.
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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#16 | |
Registered User
Join Date: Sep 2005
Location: Villa Rica Ga
Posts: 889
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Re: Need Help with vibration.
Quote:
![]() my step dad also recomended a compression test.. he doesnt think it would be the converter. i do have a filter an gasket layn around for the tranny may do that some time this week, just to check inside there....but the fan thing? come on? |
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#17 |
Registered User
Join Date: Dec 2004
Location: Northern AZ
Posts: 7,271
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Re: Need Help with vibration.
It could be? It will take like 5 min, unbolt it and run two bolts back in the pulley without the fan and run it to the rpm where the vibration usually is and see. I have a wicked vibration in my old truck, but I was running solid motor mounts, so it was to be expected. Did it just start all the sudden?
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#18 | |
Registered User
Join Date: Apr 2002
Location: New Carlisle, Ohio,USA
Posts: 1,404
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Re: Need Help with vibration.
Quote:
Later, Dan ![]() ![]() ![]()
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![]() ![]() ![]() LIFE AIN'T EASY WHEN YER FAT AND GREASY! GMC= Got More Class! ![]() ![]() |
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#19 |
Registered User
Join Date: Sep 2005
Location: Villa Rica Ga
Posts: 889
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Re: Need Help with vibration.
the vibration has been there somewhat from the start of the buildup....but i would find things here and there that i overlooked and it would get better as i wrenched an tightend all my loose ends.
took off the belt to the fan, still vibrates. still think it maybe the balancer, the ruber all around is pretty smooth but for one spot looks pretty ruff. it may have spun...what do you guys think? how do tell if a balancer has gone bad? thanx for all the help. |
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#20 |
Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Re: Need Help with vibration.
See that didn't take long to check did it?
1--tells us what motor you have and what you did in it's buildup. 2--tells us if you started with a complete motor (did it come with the balancer and flexplate?)
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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#21 |
Account Suspended
Join Date: Mar 2003
Location: ** THE FALL GUY **CHICAGO IL
Posts: 5,883
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Re: Need Help with vibration.
well i got the same problem with my 69 now..i just got my flex plate and all new bolts from summit..85.00
i am waiting for my brand new converter and front seal from them now 80.00.. i am not pulling any thing apart and skipping a 80.00 part to have to do it all over again.. Last edited by rage'nrat638; 07-12-2007 at 07:02 AM. |
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#22 |
Registered User
Join Date: Sep 2005
Location: Villa Rica Ga
Posts: 889
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Re: Need Help with vibration.
350. mild comp cam.(280 lift i b-leave), engine was in the truck when tore apart.was just stripped cleaned and a few new gaskets put in. hei dist. turbo 350 trany, thats about it. i looked at another balancer today in another truck. made me think even more its the balancer. the ruber in mine is f-ed up on one spot and looke like its coming out in another. ordered one today will be in in the morn. thanx again for the help...i think ill just put in a 502...hehehe..thanx. again. w.
Last edited by Premium72; 08-17-2006 at 09:16 PM. |
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#23 | |
Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Re: Need Help with vibration.
Quote:
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer Last edited by jhow66; 08-18-2006 at 11:23 AM. |
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#24 |
Registered User
Join Date: Sep 2005
Location: Villa Rica Ga
Posts: 889
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Re: Need Help with vibration.
ha...we'll see about that. you any where near deals gap? im going to plan a trip up there later in sept maybe to go ride for a few days...maybe we can meet up.
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#25 | |
Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Re: Need Help with vibration.
Quote:
__________________
56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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