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Old 04-25-2007, 07:09 PM   #1
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Exclamation Somethings wrong in the rear end!

my mustang keeps making this weird noise that seems to be coming from somwhere in the rear. It's almost a whining noise, and i dont know if this has any connections to the whining noise, but when i come to a complete stop and let off the brake to go again, the car jolts or something...kinda hard to explain, but if anyone know whats im talking about and how to fix it i would appreciate your input!
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Old 04-25-2007, 07:10 PM   #2
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Re: Somethings wrong in the rear end!

Do you have a fluid leak in your rear making the rear end fluid low perhaps? This can cause some issues. You should be able to see if there is a leak by looking at the rear end cover.
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Old 04-25-2007, 07:12 PM   #3
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Re: Somethings wrong in the rear end!

Yeah i actually had my boyfriend check that about a week ago, it had plenty of fluid, and there didnt appear to be any leaks..
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Old 04-25-2007, 07:15 PM   #4
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Re: Somethings wrong in the rear end!

Don't worry to much as the rear end parts on your car are pretty darn cheap. If it happens to need new gears or something of that nature let us know and we can help you make a nice upgrade for the same price as replacing the oem parts.

You can try to jack the car up and spin the tires to see if you hear any sort of grinding noises but I doubt you will. You might be describing two different issues. Some 99+ v6s have gear whine in the rear end that lasts in a given mph/rpm range and then goes away. It is usually not constant just within a given range. If this is the case it wont break anything it is just an issue with the gear installation specifications.

The other issue you might have is the transmission, is it an auto or manual? If it is an auto there might be an issue with the tq converter~ this is of course just speculation.
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Old 04-25-2007, 07:15 PM   #5
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Re: Somethings wrong in the rear end!

Bearing. How many miles on the car? How are the U-Joints?
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Old 04-25-2007, 07:18 PM   #6
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Re: Somethings wrong in the rear end!

It is an automatic...and im not even sure what u-joint is...lol the car has 85,000 miles on it.
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Old 04-25-2007, 07:21 PM   #7
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Re: Somethings wrong in the rear end!

nice car btw spectorV
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Old 04-25-2007, 07:22 PM   #8
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Re: Somethings wrong in the rear end!

Have you checked the rear calipers? They have a bad habit of seizing up on the 99-04 Mustangs. That could explain both your whine and the jolt.

Pull your rear wheels and take a good look at the rotors. If you see any grooves developing, you probably have a seized caliper.
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Old 04-25-2007, 07:27 PM   #9
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Re: Somethings wrong in the rear end!

That is a really good point. Start with the easy to check items. Jacking the car up and turning the wheel will let you know if the caliper is messed up. The wheels should turn rather easy (it just wont turn without any force but its not to bad to turn). Your emergency brake could also be on a bit. It is just one of those things that you will have to investigate to find the cause. I am also thinking it might be the axle bearings.
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Old 04-25-2007, 07:29 PM   #10
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Re: Somethings wrong in the rear end!

alrighty ill have to get the boyfriend to check those things for me this weekend, thanks for all of ya'lls help!
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Old 04-25-2007, 11:25 PM   #11
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Re: Somethings wrong in the rear end!

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Have you checked the rear calipers? They have a bad habit of seizing up on the 99-04 Mustangs. That could explain both your whine and the jolt.

Pull your rear wheels and take a good look at the rotors. If you see any grooves developing, you probably have a seized caliper.
i was leaning towards brakes as well. when you apply the brakes coming to a stop, does it go away? and when you back up and apply the brakes, does it make a weird buzzing sound? if so could be something as simple as rear pads being worn. just a thought.
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Old 04-26-2007, 07:58 AM   #12
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Re: Somethings wrong in the rear end!

no it doesnt do the jolt thing until i let off the brake...
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Old 04-26-2007, 11:49 AM   #13
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Re: Somethings wrong in the rear end!

does it make a loud audible moan as you creep away from the stop, and as soon as you get moving (around 1-2mph) it goes away? does it sound like every time you take off from a stop two pieces of metal are prying away from eachother?

if so, its the same thing i have and after new rear brakes im still stumped. if it was bearings, it should do it only after a given mph (like 50 and above). mine only does it under load, i cannot recreate the sound with the rear in the air.

however, the clunk leads me to believe its the U-Joints in the driveshaft. does it also make this clunk in reverse?
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Old 04-26-2007, 11:50 AM   #14
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Re: Somethings wrong in the rear end!

Quote:
Originally Posted by .red.pony. View Post
nice car btw spectorV
His isn't all that great.
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Old 04-26-2007, 03:48 PM   #15
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Re: Somethings wrong in the rear end!

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does it make a loud audible moan as you creep away from the stop, and as soon as you get moving (around 1-2mph) it goes away? does it sound like every time you take off from a stop two pieces of metal are prying away from eachother?

if so, its the same thing i have and after new rear brakes im still stumped. if it was bearings, it should do it only after a given mph (like 50 and above). mine only does it under load, i cannot recreate the sound with the rear in the air.

however, the clunk leads me to believe its the U-Joints in the driveshaft. does it also make this clunk in reverse?
it doesnt do the jolt thing in reverse, but sometimes when im in reverse it makes this loud grinding type sound or something...but it does only do the clunk thing when i take off then it stops...if you find out what it is let me know!
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Old 04-26-2007, 03:50 PM   #16
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Re: Somethings wrong in the rear end!

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Originally Posted by PureVenom View Post
His isn't all that great.
lol oh ur just jealous...
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Old 04-26-2007, 04:01 PM   #17
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Re: Somethings wrong in the rear end!

I can prob tell you what it is....... the U joints. Mine was doing the same thing.
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Old 04-26-2007, 04:03 PM   #18
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Re: Somethings wrong in the rear end!

you know, with the title of this thread phrased like it is, and the author being a chick, i am finding it really hard to control myself. and then Riden shows up on here and there are two chicks... must... find... control... the force... is too... strong.
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Old 04-26-2007, 04:04 PM   #19
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Re: Somethings wrong in the rear end!

O lord......... Ok youve arrived...... raised hell......... now leave! haha jk!!!
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Old 04-26-2007, 04:11 PM   #20
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Re: Somethings wrong in the rear end!

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O lord......... Ok youve arrived...... raised hell......... now leave! haha jk!!!
hey, be nice. or i won't hump your leg anymore. i know, i know, don't get your hopes up. (don't worry, i'm lying.)
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Old 04-26-2007, 04:12 PM   #21
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Re: Somethings wrong in the rear end!

Haha Doofus
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Old 04-26-2007, 04:31 PM   #22
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Re: Somethings wrong in the rear end!

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Originally Posted by .red.pony. View Post
if you find out what it is let me know!
i gave up with mine. ill probably just take it into a shop and have them **** with it. it has me totally stumped, as well as everyone i know thats ever been in the car and heard the noise.
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Old 05-02-2007, 11:38 AM   #23
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Re: Somethings wrong in the rear end!

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does it make a loud audible moan as you creep away from the stop, and as soon as you get moving (around 1-2mph) it goes away?
One of your rear calipers is not releasing. I had the same problem with my right rear caliper ('03 GT) I had to blow them out and clean them. After that no more moan.
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Old 05-02-2007, 05:46 PM   #24
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Re: Somethings wrong in the rear end!

Could you just have bled the brakes? /\
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Old 05-02-2007, 06:24 PM   #25
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Re: Somethings wrong in the rear end!

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Could you just have bled the brakes? /\
How do you do that?
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Old 05-02-2007, 06:26 PM   #26
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Re: Somethings wrong in the rear end!

Just buy a Hanes/Chilton manual for your car, it'll be in there.
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Old 05-02-2007, 06:36 PM   #27
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Re: Somethings wrong in the rear end!

thanks i'll give it a try!
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Old 05-03-2007, 08:51 AM   #28
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Re: Somethings wrong in the rear end!

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Just buy a Hanes/Chilton manual for your car, it'll be in there.
yeah, it is a bit to explain but here's a similar example

Brake Bleeding -Purging air and moisture from your brakes
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