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Vibration Problem at Higher RPM's. PLEASE HELP
#334651
05/31/09 08:32 PM
05/31/09 08:32 PM
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Joined: Jan 2004
Posts: 6,445
Missouri
68KillerBee
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Missouri
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ok, here is what all has been replaced since the vibration started... new clutch, throw out bearing, resurfaced flywheel, heads reworked, carb rebuilt, new spark plugs, different harmonic balancer, and new motor mounts.... it happens with the clutch in and out but only at higher rpm's. at idle and a little above idle it doesn't vibrate at all. It's a 440 with a 4 speed behind it. could something be screwed up with the cam, crankshaft, or rods and the motor still run normal (at idle)? it's been over 2 years since we've started messing with this and i just wanna go cruisin around with my dad in our 4 speeds  please ask any and all questions and i'll answer them as soon as i can. thanks in advance 
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Re: Vibration Problem at Higher RPM's. PLEASE HELP
[Re: JohnRR]
#334658
05/31/09 08:49 PM
05/31/09 08:49 PM
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Joined: Jan 2004
Posts: 6,445
Missouri
68KillerBee
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Quote:
Have you had the balancer and the flywheel NEUTRAL BALANCE CONFIRMED ? I had a neutral flywheel that was resurfaced wrong , it was .020 thicker on one side vs. the other , no longer NEUTRAL balance ...
will call around tomorrow and see where I can get this checked. they did the flywheel on my car too and it works fine... but there is always human error... 
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Re: Vibration Problem at Higher RPM's. PLEASE HELP
[Re: cupcake]
#334661
05/31/09 09:52 PM
05/31/09 09:52 PM
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Joined: Jan 2003
Posts: 75,008
U.S.S.A.
JohnRR
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Quote:
ballence motor & flywheel together dude
only if it's external balance , neutral balance should have no issue swapping parts that are also neutral balance .
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Re: Vibration Problem at Higher RPM's. PLEASE HELP
[Re: 68KillerBee]
#334662
05/31/09 09:54 PM
05/31/09 09:54 PM
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Joined: Jan 2003
Posts: 75,008
U.S.S.A.
JohnRR
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Quote:
also how could the flywheel just become messed up randomly. doesn't make sense how it would just become unbalanced? so far thats the best answer we have though, so the transmission will be coming out again.  
easy , someone trying to save 25 bucks and trying to do it themself or a shop that's not paying attention? All I know is I had a vibration problem , pulled the clutch and took the flywheel to get resurfaced and the shop found out it was off like that when he went to cut it and it only cut a small sliver off one side on the intial cut ...
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Re: Vibration Problem at Higher RPM's. PLEASE HELP
[Re: 68KillerBee]
#334664
05/31/09 10:04 PM
05/31/09 10:04 PM
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Joined: Jan 2003
Posts: 75,008
U.S.S.A.
JohnRR
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Quote:
Quote:
easy , someone trying to save 25 bucks and trying to do it themself or a shop that's not paying attention? All I know is I had a vibration problem , pulled the clutch and took the flywheel to get resurfaced and the shop found out it was off like that when he went to cut it and it only cut a small sliver off one side on the intial cut ...
ya, i was actually hoping you would reply to this question. i always see you trying to help people out on here . like i said i'll be looking around tomorrow to find someone that can check it.
thanks again to everyone. hopefully we can figure this thing out soon, it's getting old. car cruise coming up on friday that i wanna make with my dad.
an engine shop can check it on their balancer , bring them the flywheel and your pressure plate , they can spin it , balance the assembly and they will mark it so you know which way to assemble it so that whole assembly is balanced , one less thing to worry about .
what type of balancer do you have ? The $$$ BHJ SFI balancer I boguht was out by a few grams .
My 383 still has a vibration issue but it was run for a number of years by the prior owner with that misbalanced flywheel .
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Re: Vibration Problem at Higher RPM's. PLEASE HELP
[Re: dodger1]
#334666
06/01/09 12:53 AM
06/01/09 12:53 AM
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Joined: Jan 2004
Posts: 6,445
Missouri
68KillerBee
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Quote:
I had a vibration from a bad 4 speeed tranny mount,also my 833 was in need of a rebuild that cuased a vibration Ive also heard the pinion angle on the rear end could be wrong cuasing a vibration . Hope you get it figured out!
Thanks johnahah. hopefully we'll get it in and out this week.
while the car was up on a rack last week(getting new exhaust, headers to manifolds) i noticed the tranny mount looked kinda sideways also. while we have the transmission out we'll check out the transmission. last time we had it out, everything seemed to be fine, but we'll open it up again(after it's balanced). also this happens while sitting still so i don't think the pinion angle has anything to do with it.
thanks again
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Re: Vibration Problem at Higher RPM's. PLEASE HELP
[Re: 68KillerBee]
#334667
08/04/09 08:44 PM
08/04/09 08:44 PM
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Joined: Jan 2004
Posts: 6,445
Missouri
68KillerBee
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Rebuilt transmission, input shaft shaved off a bit, new clutch, pressure plate, flywheel.... and it's still got it. when it was just the old flywheel and bellhousing it started up and there was no vibration at all. now what? this transmission has been in and out at least 7 or 8 times this summer. 
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Re: Vibration Problem at Higher RPM's. PLEASE HELP
[Re: patrick]
#334670
08/06/09 06:09 PM
08/06/09 06:09 PM
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Joined: Jun 2003
Posts: 4,872
connecticut
pnypwr
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connecticut
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hmm hows your fan and water pump? drop the belts and give it shot, I jad a 5.0l mustang that would shake out your fillings...water pump sprung a leak, changed it smooth as a babys bottom...step one drop the accessories and try!
"Are you gonna bark all day lil doggy? Or are you gonna bite?"
05 ram 2500 ctd
74 gremlin x 360
65 mustang 347
70 coronet R/T 440
03 Mach 1
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Re: Vibration Problem at Higher RPM's. PLEASE HELP
[Re: pnypwr]
#334671
08/06/09 10:59 PM
08/06/09 10:59 PM
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Joined: Jan 2004
Posts: 6,445
Missouri
68KillerBee
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Missouri
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Quote:
hmm hows your fan and water pump? drop the belts and give it shot, I jad a 5.0l mustang that would shake out your fillings...water pump sprung a leak, changed it smooth as a babys bottom...step one drop the accessories and try!
we did that, still a vibration. with everything attached clutch pressed in or out, driving or just revving up, the vibration appears. with the clutch, pressure plate, d-shaft and trans out there was no vibration at any rpm.
put in new clutch, pressure plate, flywheel (refurbished from brewers), rebuilt transmission, new throw out bearing, and the vibration is still there 
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Re: Vibration Problem at Higher RPM's. PLEASE HELP
[Re: ph23vo]
#334674
08/16/09 01:25 PM
08/16/09 01:25 PM
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Joined: Jan 2004
Posts: 6,445
Missouri
68KillerBee
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Missouri
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no confusion here at all (other than why the vibration is present  ) yes, we started it with just the flywheel, starter, and bellhousing and there was no vibration at all.- that means it is not in the motor. (save for a balance issue which we've figured out there should not be one. everything should be zero balance) once we put it all back together(minus driveshaft). you can start it and feel the vibration with clutch in or out. putting the driveshaft in and driving it around in gear its still there. we are going to replace the bellhousing next after talking with jamie passon at the nationals.  this car used to run fine as is, but the vibration eventually developed and its been downhill since haha
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Re: Vibration Problem at Higher RPM's. PLEASE HELP
[Re: 68KillerBee]
#334676
08/16/09 07:58 PM
08/16/09 07:58 PM
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Joined: Oct 2007
Posts: 236
Richmond , Virginia
chagjr
enthusiast
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enthusiast
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Posts: 236
Richmond , Virginia
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Quote:
ok, here is what all has been replaced since the vibration started...
new clutch, throw out bearing, resurfaced flywheel, heads reworked, carb rebuilt, new spark plugs, different harmonic balancer, and new motor mounts....
it happens with the clutch in and out but only at higher rpm's. at idle and a little above idle it doesn't vibrate at all.
It's a 440 with a 4 speed behind it. could something be screwed up with the cam, crankshaft, or rods and the motor still run normal (at idle)? it's been over 2 years since we've started messing with this and i just wanna go cruisin around with my dad in our 4 speeds
please ask any and all questions and i'll answer them as soon as i can.
thanks in advance
What is higher RPM? (3000, 4000, 5000)
F.A.S.T/1969 SUPER BEE/383/AUTO/AVS 11.58 @ 117.98 1.71 60ft mph F.A.S.T Legal
1969 DART SWINGER/340(420CI)/6.52 @ 105.39 1.45 60ft (1/8 mile)10.22 @130.5 (1/4 mile)
Harry
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