IHADAV8.com - Turbo Buick Tech, and Nonsense

Tech Area => General Auto Tech => Topic started by: chrisgarrett on May 27 2011, 10:36:25 AM

Title: Vibrating Sound
Post by: chrisgarrett on May 27 2011, 10:36:25 AM

When I'm cruising in the car, there is a vibrating noise just before the trans shifts.  The car is driving normally and shifting normally.  Any ideas?

Title: Vibrating Sound
Post by: SuperSix on May 27 2011, 12:32:47 PM

Is there any way you could record it?

Title: Re: Vibrating Sound
Post by: chrisgarrett on May 27 2011, 02:22:24 PM

No, I don't see how I could record it.

Title: Re: Vibrating Sound
Post by: chrisgarrett on May 29 2011, 08:12:21 AM

Got rid of the vibration.  I had zip-tied the trans cooler lines away from the crossover pipe and they were contacting the intercooler bracket further up, causing them to vibrate.

Title: Vibrating Sound
Post by: SuperSix on May 29 2011, 09:48:41 AM

(http://www.chasingambulances.net/wp-content/uploads/2010/01/the_more_you_know2.jpg)

Title: Re: Vibrating Sound
Post by: chrisgarrett on May 30 2011, 09:34:20 PM

Damn vibraton sound is back.  I can't feel it, I can only hear it.  Whenever I accelerate, even a little, there's the vibrating sound.  The car is running and shifting fine.  What does a bad converter sound like?  I've had my damn stethescope and hose on every part of the darn car.  Can't find it.  Any ideas?

Title: Re: Vibrating Sound
Post by: chrisgarrett on May 30 2011, 09:47:40 PM

Doesn't do it when idling.  Only on acceleration.

Title: Re: Vibrating Sound
Post by: ULYCYC on May 30 2011, 09:54:24 PM

Sound like this http://www.youtube.com/watch?v=K3e98B5UUyY

Title: Re: Vibrating Sound
Post by: chrisgarrett on May 30 2011, 10:00:52 PM

Holy Crap!  It doesn't sound anything like that.  It's as if the inspection cover were loose (it's not).  Or the intercooler shroud (metal) were vibrating. It does it when I first accelerate, at any speed,  for about 20 seconds, and then it's gone.  I know this isn't much to go on, but I''m just looking for suggestions on what I might look at.

Title: Re: Vibrating Sound
Post by: DCEPTCN on May 30 2011, 11:18:50 PM

I didn't respond initially because this is a long shot, but- I had a friend who'd had a vibrating sound at idle because the mounting bolts for the crossmember (that supports the tranny at the rear) were loose.

Title: Re: Vibrating Sound
Post by: chrisgarrett on May 31 2011, 05:29:58 AM

Someone else suggested that and I checked the bolts.  They are tight.  Thanks

Title: Vibrating Sound
Post by: Steve Wood on June 02 2011, 09:29:20 AM

My bad converters usually sound like there are rocks bouncing around in them.

It may be time to disconnect the converter, push it back, and rev the engine to see if the sound is gone.

Title: Re: Vibrating Sound
Post by: chrisgarrett on June 02 2011, 09:44:50 AM

Steve,
I sure it's not the converter.

Title: Vibrating Sound
Post by: Steve Wood on June 02 2011, 10:36:12 AM

sounds like a two man job...one to maintain the vibration and one to try to zero in on it.

Title: Re: Vibrating Sound
Post by: chrisgarrett on June 02 2011, 10:41:09 AM

Someone would have to ride under the hood, because it only does it under load.

Title: Re: Vibrating Sound
Post by: $1987 GN$ on June 02 2011, 12:44:47 PM

Quote from: "chrisgarrett @ Thu Jun 02, 2011 9:41 am"

Someone would have to ride under the hood, because it only does it under load.

Here is some help.  :)
(http://ihadav8.com/phpBB2/files/fox_under_hood.jpg)
AJ___

Title: Re: Vibrating Sound
Post by: Steve Wood on June 02 2011, 04:00:04 PM

Quote from: "chrisgarrett @ Thu Jun 02, 2011 8:41 am"

Someone would have to ride under the hood, because it only does it under load.

put a tree in front of the bumper and load against that