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Old 10-17-2011, 05:31 PM   #1
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Loud vibrating noise!!!

Were should I start..my mustang starts making a vibrating noise on deceleration or when I hit about 70mph. Feels like somewere in the rearend. Any ideas thank u
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Old 10-17-2011, 06:16 PM   #2
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Re: Loud vibrating noise!!!

Pinion bearings make noise on a decel if you have had a gear swapped recently inhave seen the pinion nt not get torqued properly and cause that
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Old 10-17-2011, 07:17 PM   #3
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Cool thanks bro..i kinda had a feeling it was somthing in my rear diff. The guy that had the car before me told me he had put rear gears in it.
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Old 10-17-2011, 07:21 PM   #4
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Re: Loud vibrating noise!!!

Check your rear tires for balance or slipped belts too.
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Old 10-17-2011, 07:50 PM   #5
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coo thanks for the info guys..will it still be my tires if it only does it at high speeds or on high speed decel.
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Old 10-17-2011, 08:01 PM   #6
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Also make sure the four bolts holding your driveshaft on aren't loose.
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Old 10-17-2011, 08:45 PM   #7
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Cool thanks for the help guys...ill check those thinks out and see what I come up with.
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Old 10-17-2011, 09:16 PM   #8
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Re: Loud vibrating noise!!!

Quote:
Originally Posted by Trojan Horse View Post
Check your rear tires for balance or slipped belts too.
^ I second that!
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Old 10-17-2011, 10:49 PM   #9
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Re: Loud vibrating noise!!!

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coo thanks for the info guys..will it still be my tires if it only does it at high speeds or on high speed decel.
Yes, it is quite possible.
You can never tell at what frequency, speed or conditions an out of balance or slipped belt tire might cause a vibration.
Most balance problems only become noticeable at higher speeds and many become even more significant on deceleration.
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Old 10-17-2011, 11:53 PM   #10
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Quote:
Originally Posted by Trojan Horse

Yes, it is quite possible.
You can never tell at what frequency, speed or conditions an out of balance or slipped belt tire might cause a vibration.
Most balance problems only become noticeable at higher speeds and many become even more significant on deceleration.
If it is this the tire can blow and cause a lot of damage or an accident. Same thing w/ driveshaft bolts, they'll leave you walking
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Old 10-19-2011, 05:43 PM   #11
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My guess would be the drive shaft. An aluminum one would fix the problem if none of the cheaper fixes help.
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Old 10-19-2011, 06:05 PM   #12
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Re: Loud vibrating noise!!!

Also check your u-joints... especially the rear one...
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Old 10-28-2011, 01:02 AM   #13
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Thanks guys...it was my drive shaft it was loose .
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Old 10-28-2011, 05:01 AM   #14
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Re: Loud vibrating noise!!!

glad you got that fixed
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Old 10-28-2011, 08:37 AM   #15
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Re: Loud vibrating noise!!!

gears usually just whine, they dont generally vibrate, if you have stiff bushings or something in the rear then that can translate into the frame of the car and make more noise.

Gear whine seems to go away when you get on the gas but comes back when decel so it could all be related.
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Old 10-28-2011, 11:15 AM   #16
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Re: Loud vibrating noise!!!

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Thanks guys...it was my drive shaft it was loose .

Glad you got that fixed before disaster struck.
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Old 10-28-2011, 12:21 PM   #17
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Oh yeah I called it lol, glad you got it fixed.
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Old 10-28-2011, 01:12 PM   #18
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Re: Loud vibrating noise!!!

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Oh yeah I called it lol, glad you got it fixed.
Yep you "Da Man!"
Hit the nail on the head or rather the driveshaft on the bolts I suppose.
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Old 10-28-2011, 02:41 PM   #19
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Quote:
Originally Posted by Trojan Horse

Yep you "Da Man!"
Hit the nail on the head or rather the driveshaft on the bolts I suppose.
I literally had to tighten mine and loctite them about a week before his post lol.
My poor car has been through a lot.
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Old 10-28-2011, 04:21 PM   #20
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Re: Loud vibrating noise!!!

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I literally had to tighten mine and loctite them about a week before his post lol.
My poor car has been through a lot.
I see, that's almost like cheating you know.

I always use Loctite on almost all of my fasteners unless the item I am working on specifically excludes it. It's better to be safe than sorry later.
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Old 10-28-2011, 05:47 PM   #21
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Quote:
Originally Posted by Trojan Horse

I see, that's almost like cheating you know.

I always use Loctite on almost all of my fasteners unless the item I am working on specifically excludes it. It's better to be safe than sorry later.
I used blue and they still backed out this time but not the time before. .
This time I used red just to be sure.
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Old 10-28-2011, 06:41 PM   #22
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Quote:
Originally Posted by 93slowstang

I used blue and they still backed out this time but not the time before. .
This time I used red just to be sure.
Oh wow.. Going to need air or heat ti get off now lol
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Old 10-28-2011, 06:53 PM   #23
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Re: Loud vibrating noise!!!

But I don't have to worry about it backing out right now. Lol
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Old 10-28-2011, 07:16 PM   #24
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But I don't have to worry about it backing out right now. Lol
Yup! It's definitely a good thing when you have the parts you want! My bro used nothing and his fell out
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Old 10-29-2011, 01:03 AM   #25
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Re: Loud vibrating noise!!!

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I used blue and they still backed out this time but not the time before. .
This time I used red just to be sure.
Hmmm, that makes me wonder if you don't have some heating, vibration or something else going on there.

As long as the bolt threads and hole threads are clean I have never had a fastener back off using the Blue Loctite.
I always use some carb or brake cleaner and compressed air to make sure the threads are clean. A little bit of oil or grease can negate the Loctite's holding ability.

A small propane hand torch will usually suffice to loosen the Red Loctite's death grip on a fastener.
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Old 10-29-2011, 01:39 AM   #26
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I almost think I didn't put enough on them, but red is doing its job so far lol. I always clean the bolts when I take them out. Never thought about heat to loosen red, thanks for that tip.
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Old 10-29-2011, 09:51 PM   #27
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Re: Loud vibrating noise!!!

Ok so the vibration on my fox was also the bolts at the rear of the drive shaft tightened them up and the vibration has completely disappeared, now if they back out again were just going to put some locktite on them so they stay...also should I put some locking washers on the bolts or are they fine on there own?
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Old 10-29-2011, 10:03 PM   #28
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10 points for slowstang !
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Old 10-29-2011, 10:37 PM   #29
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Re: Loud vibrating noise!!!

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Ok so the vibration on my fox was also the bolts at the rear of the drive shaft tightened them up and the vibration has completely disappeared, now if they back out again were just going to put some locktite on them so they stay...also should I put some locking washers on the bolts or are they fine on there own?
You won't need lockwashers if you use the Loctite.
I would do it now before it loosens again.
It may save you from being stranded or injured if the driveshaft should happen to come completely out the next time.
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Old 10-29-2011, 10:42 PM   #30
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Quote:
Originally Posted by Trojan Horse

You won't need lockwashers if you use the Loctite.
I would do it now before it loosens again.
It may save you from being stranded or injured if the driveshaft should happen to come completely out the next time.
+1, and make sure you clean the bolts off well and use blue loctite. Not red like me..lol
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Old 10-29-2011, 10:56 PM   #31
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Re: Loud vibrating noise!!!

Will do I know we cleaned the bolts and the holes they went into pretty good we'll just take the bolts back out tomorrow and get some locktite on them *****es
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