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Old 07-25-2006, 04:38 PM   #1
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Rear end noise

dont know if im posting this in the right area but, I have a 00 GT with 3.73 gears steeda lowering suspension, powerflow 75mm TB/upper intake plenum, K&N filter, diablosport custom dyno tune, the car is a 5 speed manual. OK now for the problem, for about two years now I have heard a noise from the rear of my car, ive been told it was the brakes, differential, gears, axle, axle bearing from several different sources. I have replaced the driver side axle and the bearings in that side aswell. The noise is stoll present when its in neutral or I have the clutch pushed in so I know its not the tranny, also the noise is speed sensitive (it gets a little louder and more frequent in repetition as speed increases) I am completely out of ideas of what this could be and am hoping someone else has experienced this and can help me out.

Thanks Bsmith
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Old 07-25-2006, 04:45 PM   #2
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Re: Rear end noise

My bet would be that the gears are incorrectly installed. They have to set up correctly else they will whine. The whine is usually only noticed at a given mph range~ not constantly though.
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Old 07-25-2006, 11:46 PM   #3
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Re: Rear end noise

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My bet would be that the gears are incorrectly installed. They have to set up correctly else they will whine. The whine is usually only noticed at a given mph range~ not constantly though.
I agree.
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Old 07-26-2006, 09:25 AM   #4
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Re: Rear end noise

well the gears were installed at a ford dealership by a ford technician, also the noise didnt start untill 2 years after they were installed. Its not a whine it almost sounds like a rubbing noise that starts as soon as I start moving, and gets only a little louder as I speed up, but the (tempo) speeds up as I do in the car. When my friend and I replaced the driver side axle there was no noticable wear in the gears(metal shavings) in the rear end or in the fluid in the diff......

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Old 07-26-2006, 09:29 AM   #5
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Re: Rear end noise

just because a ford tech did something, doesn't mean its right. we have seen lately that ford techs may not know what we think they know. plus, its a stealership, and will take ur money and break your car to get more money. best bet is to take it to a reputable car shop in town by you. Simple Simon can do a lot of things, midas, auto king.... those are all pretty trust worthy.... i don't like meinike or whatever.
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Old 07-26-2006, 12:45 PM   #6
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Re: Rear end noise

from what I have heard from numerous different sources, if it was my gears it would be a whining noise, also if they were installed incorectly i would have heard noise from the day I drove it out of the dealership after installation. it really isnt unbearable but im just too damn anal about my car and I hate having a problem with it that i dont know how to solve.

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Old 07-26-2006, 01:36 PM   #7
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Re: Rear end noise

If they did not start for two years then it may very well be something else. Have you removed the rear cover and inspected for wear~ etc, and checked the bearings.
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Old 07-26-2006, 03:39 PM   #8
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Re: Rear end noise

yes about two weeks ago when I replaced the driver side axle we had to remove the rear axle housing, my buddy (hes a tech for a lexus dealer her in stl and also owns a 03 GT, his brother has a 02 GT and his other brother has a 02 Cobra) so to say the least hes familiar with mustangs, said there was no metal shavings or anything in the fluid, and also said that the play in the drive shaft was normal (so we ruled out backlash)

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Old 07-26-2006, 03:40 PM   #9
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Re: Rear end noise

we also replaced the axle bearing

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Old 07-31-2006, 11:45 AM   #10
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Re: Rear end noise

what kind of noise?

what speeds is it most frequent?
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Old 07-31-2006, 02:41 PM   #11
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Re: Rear end noise

It is happening at all speeds above about 5 mph, it almost sounds like a rubbing noise like wawawawawawawawa if that helps, it speeds up in frequency as I do in the car

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Old 07-31-2006, 03:02 PM   #12
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Re: Rear end noise

Gears, people make mistakes once in a while even pros.
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Old 07-31-2006, 05:06 PM   #13
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Re: Rear end noise

I thought that if it was the gears it would be a pretty loud howling noise, and what will happen if I keep driving the car, its been going on for about two yrs now, and about 30k miles

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Old 07-31-2006, 08:08 PM   #14
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Re: Rear end noise

have you though about the clutch or throw bearing?
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Old 07-31-2006, 08:41 PM   #15
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Re: Rear end noise

actually a year ago I had to have my synchronizers in the transmission rebuilt and they replaced the throw out bearing when they did that, also my clutch engages when when I lift my foot about 1-2 inches and there is no slippage at all

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Old 08-02-2006, 02:00 AM   #16
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Re: Rear end noise

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Originally Posted by bsmith782 View Post
It is happening at all speeds above about 5 mph, it almost sounds like a rubbing noise like wawawawawawawawa if that helps, it speeds up in frequency as I do in the car

BSmith
i have what sounds like the same problem, only mine starts from a stand-still and goes away after 2mph. just a loud oscillating moan, almost like im trying to move with the brakes on(though theyre not, and brakes have been checked).

i think its my rear end trac-loc unit going out, as mine does it more when im trying to turn rather than straight.
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Old 08-15-2006, 05:17 PM   #17
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Re: Rear end noise

bsmith: put the back of your car on some blocks or jack it up a bit so you can get under there and tighten up the bolts on your control arms. (a 3/4inch or about 15-17mm wrench should do it) i forget if its US or metric. they do tend to loosen up a bit on their own frequently and can build up a little bit of slack and you might hear a clinging or popping noise when the motion of your car changes, hitting a bump, &c.. Not ecactly sure if this is your problem but i seriously 99.9% doubt that its gears or pinion. try it out .. hope it helps you out
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Old 08-15-2006, 05:49 PM   #18
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Re: Rear end noise

thanks alot for the advice invictus, on my next day off ill try that and see if it helps. ill post the results

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Old 08-15-2006, 10:11 PM   #19
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Re: Rear end noise

also..if you have an aftermarket exhaust system its very likely that it could be loose and rubbing of clinging against your suspension go under there (make sure u had time to let them cool down so you wont burn the piss out of yourself) and shake them see if they aren't loose.

also put ur body weight against one of your rear fenders right above the wheel and rock your car side to side as hard as you can to test the suspension out.. if it makes the same noise then you've found ur prob.

just a few ideas that popped up.. either way i'd check and retorque the control arm bolts and if they're right see what kinda condition the bushings are in it might need replacing alltogether. if they do i'd recommend some tubular ones they're very nice and you can grease them eaisly through the grease alamites. good luck bro hope this helps u out
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Old 08-16-2006, 12:15 PM   #20
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Re: Rear end noise

I really do think that the suspension it squeaky because when I drive down a road It squeaks but the wierd thing is that when I apply the brakes it stops???

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Old 08-16-2006, 04:55 PM   #21
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Re: Rear end noise

Hmm... Well if it stops when you apply your brakes then it's more than likely brake related. Do you have ABS? Also might want to check you calipers...

I thought it might be suspension because it's a common problem for the stangs control arms to loosen over time, and after reading the thread it appears you've messed with everything except suspension... Hmmm
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Old 08-16-2006, 05:10 PM   #22
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Re: Rear end noise

Its wild isnt it, squeaks are probly the least of my worries, the rear end noise (or where ever its coming from) just gets under my skin, because i cant figure out what the hell it is.

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Old 08-16-2006, 05:43 PM   #23
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Re: Rear end noise

It wouldn't happen to sound like this would it?



video is kinda messed up but still you can hear the sound towards the end
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Old 08-16-2006, 06:16 PM   #24
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Re: Rear end noise

Sounds like a wheel bearing. Had a vehicle do the same thing. At first I thought it was a flat spot on a tire or brakes.
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Old 08-17-2006, 04:27 PM   #25
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Re: Rear end noise

in that video ^^ the vehicle has a loose bolt on the lower control arm, rear, passenger side. torque those bolts down good and he was good to go.

a lot of people don't even think about their suspension when they get some noise coming from their rear, they change their axle, differential housing, gears, brakes, hubs.. and completely forget about the suspension.

then again.. a buddy of mine had a noise coming from his transmission on his jeep wrangler and he spent almost 2,000 replacing his rear suspension thinking he'd solve the problem.. turned out to be just a minor $40 job on the tranny (forget what he replaced) ..
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Old 08-18-2006, 02:05 PM   #26
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Re: Rear end noise

No the niose im getting isnt like the one in the video, it happens when im driving as soon as i start moving. It really doesnt get that much louder as i speed up only faster in the tempo. Its driving me crazy.

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Old 08-18-2006, 02:48 PM   #27
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Re: Rear end noise

If thats the case and it stops when you apply the breaks then it's definately brake related!
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Old 08-18-2006, 03:51 PM   #28
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Re: Rear end noise

no, thats a different noise the 1) rubbing noise is in the rear. the 2)squeaking stops when I apply the brakes. so there is two different noises im dealing with.
ahhhhh..

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Old 08-21-2006, 09:47 PM   #29
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Re: Rear end noise

sounds like carrier bearings
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Old 08-22-2006, 09:37 AM   #30
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Re: Rear end noise

I just wish I was mechanically inclined enough to do this myself, where are the carrier bearings located?
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Old 08-22-2006, 06:39 PM   #31
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Re: Rear end noise

The carrier bearings are on either side of diff. housing that holds the ring gear. You should also check the pinion bearings.
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Old 08-23-2006, 09:46 AM   #32
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Re: Rear end noise

I think ill just drop it off at my local repair shop while im on my honeymoon, and let them tear into it.

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