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Re: Please, please help with vibration problem
[Re: RapidRobert]
#931081
03/12/11 02:22 AM
03/12/11 02:22 AM
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Joined: May 2009
Posts: 62
montreal, quebec,canada
7e5dartsport
member
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member
Joined: May 2009
Posts: 62
montreal, quebec,canada
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anything from the engine that could touch the body? i mean exhaust system/headers touching the torsion bars , engine, trans or body. maybe exhaust hangers or mounting points that are attached solid instead of rubber. bad engine mounts -rubber- that are worn-out would make the car vibrate too.i would check that carefully.
fully legal sounds the same as full illegal...
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Re: Please, please help with vibration problem
[Re: 7e5dartsport]
#931082
03/18/11 02:54 PM
03/18/11 02:54 PM
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Joined: Jan 2011
Posts: 15,879
Central Florida
larrymopar360
OP
Stud Muffin
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OP
Stud Muffin
Joined: Jan 2011
Posts: 15,879
Central Florida
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Yes, mine does it in park or nuetral.Mine has all new mounts.They were poly motor and trans mount.First I switched back to rubber on motor mounts, but no change.Switched back to rubber trans mount and that hides alot of vibration.I can't find anything rubbing or touching.Trans has clearance, as does exhaust.Mopar Tech is baffled too, and does not think it is internal with the motor.He has 6 years with MP and has never seen one of these crate motors have a balance issue.He said although it is harmonic in nature, it could be a couple of cylinders being too lean, and that I should check the plugs for that, as well as anything spark related.Everything is new, and installed with motor other than the plug wires and accessories.I removed accessories belts and ran it for a minute, but it didn't help.I guess I could try another set of wires.Just seems strange that it's harmonic.If it did it all the time I could see it being spark related.
Facts are stubborn things.
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Re: Please, please help with vibration problem
[Re: rapom]
#931085
03/20/11 07:23 PM
03/20/11 07:23 PM
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Joined: Jan 2011
Posts: 15,879
Central Florida
larrymopar360
OP
Stud Muffin
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OP
Stud Muffin
Joined: Jan 2011
Posts: 15,879
Central Florida
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Quote:
I had that problem in a chevy once and it was custom made 3500 stall converter. I would get my bad vibration around 50mph. Sometimes I had it and sometimes I didn't. I could fix it, at speed, by slipping the tranny into neutral, rev up the engine a couple of times, then slip it back into drive and usually it would clear up. I even took it back to the tranny shop to have it rebuilt. They cut it open and couldn't find anything wrong with it. I put it back in and the vibration was less but still there. Fixed the problem permantly by replacing converter.
Not sure if this is your problem though but wanted to let you know of my experence.
Thanks for info. I have a gut feeling mine is converter, and I am tempted to spend the money on another one. It is not too bad though, so I may wait a while when funds are available. Maybe will try a B&M instead of the TCI I have now. Mine does feel like it is either not there at all sometimes, or less at times. Thanks.
Facts are stubborn things.
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Re: Please, please help with vibration problem
[Re: scratchnfotraction]
#931087
03/24/11 12:51 AM
03/24/11 12:51 AM
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Joined: Jan 2011
Posts: 15,879
Central Florida
larrymopar360
OP
Stud Muffin
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OP
Stud Muffin
Joined: Jan 2011
Posts: 15,879
Central Florida
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It sure is frustrating. I am bound to figure it out. I can at least drive it since I replaced the poly trans mount with an OEM one. The vibration is only slightly noticable. I WILL figure it! I will let you know when I do. Thanks!
Facts are stubborn things.
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Re: Please, please help with vibration problem
[Re: larrymopar360]
#931088
03/25/11 03:31 AM
03/25/11 03:31 AM
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Joined: Jan 2003
Posts: 568
Ormond Beach, FL
71STROKERFISH
mopar
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mopar
Joined: Jan 2003
Posts: 568
Ormond Beach, FL
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I had some real bad vibs coming from my drive line a while back. I determined with alot of info from my brother Mopartners that the cause was when I dropped the trans out, then reinstalled it there was some sorta binding going on in the motor/trans mounts. I loosed all the motor mounts and trans mount bolts, started it and shifted from P to 1 several times, performed many power braking applications, some were extremely agressive. I then torqued all the bolts down....vibs went away.
I've gone through all the wickets everyone has mention: dampner, convertor, bent pulley etc etc.....
You might give it a try. I never had vibs before this until I removed the trans to replace the ring gear on the convertor.
Also, someone on Moparts referred me to a factory diagnosis diagram the Mother Mopar created back in the day. It was money! You might look in the arhcves....this has been since 2008...I'll look myself..
good luck!
-dc
SOUTHERNPLAINSMOPAARFEST.COM
2018 Jeep Trackhawk
1994 Jeep Grand Cherokee, 5.2 AWD-Daily grinder since 1997
1971 Barracuda, 414ci, 6bbl Fitech, 727
1970 Barracuda Convertible, 472 Ray Barton Hemi, 727
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Re: Please, please help with vibration problem
[Re: 71STROKERFISH]
#931089
03/26/11 08:09 PM
03/26/11 08:09 PM
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Joined: Jan 2011
Posts: 15,879
Central Florida
larrymopar360
OP
Stud Muffin
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OP
Stud Muffin
Joined: Jan 2011
Posts: 15,879
Central Florida
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Quote:
I had some real bad vibs coming from my drive line a while back. I determined with alot of info from my brother Mopartners that the cause was when I dropped the trans out, then reinstalled it there was some sorta binding going on in the motor/trans mounts. I loosed all the motor mounts and trans mount bolts, started it and shifted from P to 1 several times, performed many power braking applications, some were extremely agressive. I then torqued all the bolts down....vibs went away.
I've gone through all the wickets everyone has mention: dampner, convertor, bent pulley etc etc.....
You might give it a try. I never had vibs before this until I removed the trans to replace the ring gear on the convertor.
Also, someone on Moparts referred me to a factory diagnosis diagram the Mother Mopar created back in the day. It was money! You might look in the arhcves....this has been since 2008...I'll look myself..
good luck!
I will def give this a shot! Thanks!
Facts are stubborn things.
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Re: Please, please help with vibration problem
[Re: larrymopar360]
#931090
03/26/11 08:12 PM
03/26/11 08:12 PM
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Joined: Jan 2003
Posts: 568
Ormond Beach, FL
71STROKERFISH
mopar
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mopar
Joined: Jan 2003
Posts: 568
Ormond Beach, FL
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Let us know what you come up with....
-dc
SOUTHERNPLAINSMOPAARFEST.COM
2018 Jeep Trackhawk
1994 Jeep Grand Cherokee, 5.2 AWD-Daily grinder since 1997
1971 Barracuda, 414ci, 6bbl Fitech, 727
1970 Barracuda Convertible, 472 Ray Barton Hemi, 727
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Re: Please, please help with vibration problem
[Re: BigTerry]
#931093
06/14/11 04:03 PM
06/14/11 04:03 PM
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Joined: Jan 2003
Posts: 1,978
Southaven, MS
BossRide
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,978
Southaven, MS
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Anybody have any other thoughts on this?
Mine is doing the same thing... about 10k miles on a rebuilt 360, new balancer, flexplate, TC, new 904 trans, mounts, belts off or on, park and neutral it still vibrates.... timing is good, oil pressure is good, no rattling noises, been doing it for a while... no drop in performance, just a harmonic-type of vibration around 2 grand.
is there anything on the inside that can go bad?? That's about all that's left on mine..
The Blue Goose
My instagram: Bossride
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Re: Please, please help with vibration problem
[Re: scratchnfotraction]
#931095
06/14/11 04:44 PM
06/14/11 04:44 PM
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Joined: Jan 2003
Posts: 1,978
Southaven, MS
BossRide
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,978
Southaven, MS
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Mine was fully balanced during the rebuild, (with new pistons) and built by a good shop, and racked up lots of miles before any vibration.. it just kind of started. I originally thought it was a transmission bearing, but that's been changed... new flexplate, TC, balancer, mounts... no change.
The Blue Goose
My instagram: Bossride
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