Will a lose trans mount cause a vibration at high speeds?
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Joined: Mar 2003
Posts: 1,146
From: Maryland
Will a lose trans mount cause a vibration at high speeds?
After my trans install i noticed a moderate vibration from 55- 80 mph not related to RPM just speed.
I checked my poly trans mount and it has about 1/4-1/2 inch play in it.
I checked my poly trans mount and it has about 1/4-1/2 inch play in it.
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Joined: Jan 1999
Posts: 323
From: Elma (Buffalo), NY
Re: Will a lose trans mount cause a vibration at high speeds?
Sounds like you installed the driveshaft 180* out of phase. The DS is balanced with the yoke and needs to be re-installed the same way it was removed.
I actually just went through the same thing after pulling my trans. I had a harmonic vibration at the same speeds.
To fix, just unbolt the DS, rotate 180* and bolt it back up. That should take care of it.
Dave
I actually just went through the same thing after pulling my trans. I had a harmonic vibration at the same speeds.
To fix, just unbolt the DS, rotate 180* and bolt it back up. That should take care of it.
Dave
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Joined: Mar 2003
Posts: 1,146
From: Maryland
Re: Will a lose trans mount cause a vibration at high speeds?
That was the first thing i did, and it helped alot with the vibration, but it still shakes the change around in my cup holder at over 55 mph.
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Joined: Dec 2002
Posts: 2,365
From: Philly,PA
Re: Will a lose trans mount cause a vibration at high speeds?
well dont poly trans mounts vibrate anyways? I went with a LS1 trans mount and i am very happy with the mount. Are you sure the nut for the trans mount is tight?
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Joined: Jan 2003
Posts: 472
Re: Will a lose trans mount cause a vibration at high speeds?
The mount has play between the crossmember or tranny and mount or is it just play in the bushing itself? The poly bushing will flex a little but there should be no play between either the crossmember and mount or transmission and mount. The nut could be crossthreaded and just feel tight.
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Joined: Mar 2003
Posts: 1,146
From: Maryland
Re: Will a lose trans mount cause a vibration at high speeds?
the space is between the mount and the crossmember, as i looked at it better it is actulay betwen the bolt and the cross member (kinda like its not screwed all the way in) It is not cross threaded. I am going to just get some washers i guess.
NOW does anyone know if this sounds like it is the cause of my vibration?
NOW does anyone know if this sounds like it is the cause of my vibration?
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Joined: Jan 2004
Posts: 1,903
From: Littlestown, PA
Re: Will a lose trans mount cause a vibration at high speeds?
I had the same problem with my Spohn trans mount bolt bottoming out before it was tight. It came with a stud, so I ditched the bolt and used the stud and nut approach...Plenty tight, no vibration...
--Alan
--Alan
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Joined: Mar 2003
Posts: 1,146
From: Maryland
Re: Will a lose trans mount cause a vibration at high speeds?
Originally Posted by ABA383
I had the same problem with my Spohn trans mount bolt bottoming out before it was tight. It came with a stud, so I ditched the bolt and used the stud and nut approach...Plenty tight, no vibration...
--Alan
--Alan
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Joined: Jan 2004
Posts: 1,903
From: Littlestown, PA
Re: Will a lose trans mount cause a vibration at high speeds?
I didn't drive it, but I would think that it would cause all kinds of vibration, especially under load when the trans tries to twist on the mount. I would either do the stud method or just get a shorter grade 8 bolt.
--Alan
--Alan
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