Strange Noise. What could it be?

01VBmustang · September 16th, 2011, 07:21 PM

I have a 98 cobra.

It makes a strange noise that i would describe as a clunking sound. This happens when i accelerate and when i let off the gas - only in gear.

If i hold a constant RPM/speed the noise is nonexistent. This noise occurs about 75 % of the time that i accelerate/decelerate.

It is very annoying/embarrassing when audible.

Anyone know what to start looking at or what it could be?

cschoening09 · September 16th, 2011, 07:31 PM

5 speed or auto? coming from front or back? which side? start by checking your lug nuts..mine was doing the same a month or so ago and i thought it was a u joint. turned out that the drivers side lugs on the rear were loose and had bout half an inch of play in the wheel lol. other than that it sounds like u joints to me. thats what i would put the bet on

01VBmustang · September 16th, 2011, 07:38 PM

5 Speed. Ill check that out man, thanks. Its actually kind of hard to tell which side, ill pay more attention to it the next time im out.

01VBmustang · September 20th, 2011, 08:22 PM

So the noise seems to be coming from the front of the passenger side of the car.. Again it is a clunking/ squeking sound.

Anyone else had a similar experience or know what could cause this?

Thumbie · September 21st, 2011, 01:42 AM

I think I am having the EXACT same problem haha. Can you almost feel it in the pedals?

1989Gt. · September 21st, 2011, 01:21 PM

tranny mount loose?

95Slobra · September 21st, 2011, 01:27 PM

loose exhaust?? hanger broke off exhaust is what it sounds like

ReverendDexter · September 21st, 2011, 01:58 PM

Originally Posted by cschoening09

5 speed or auto?

he said it was a cobra.

OP, did you do your brakes any time recently? I had a similar issue when I bought a set of pads and they had forgot to put the anti-rattle clip in the box (and I didn't know enough at the time to know it was necessary). Once I got it in there, the clunking went away.

zinc-vert02 · September 21st, 2011, 02:26 PM

motor mount? u joint? trans mount?

01VBmustang · September 21st, 2011, 02:44 PM

Originally Posted by Thumbie

I think I am having the EXACT same problem haha. Can you almost feel it in the pedals?

I do feel something in my clutch pedal but i dont think it is related...the clutch pedal rattles unless i lightly put my foot on it. I think my cable might be stretched b/c my clutch pedal actually sits about an inch or so above the others- i think i should adjust that haha

Ill check out the exhaust hangers..

And Reverend, no brake work has been recently.

01VBmustang · September 21st, 2011, 02:47 PM

Originally Posted by Thumbie

I think I am having the EXACT same problem haha. Can you almost feel it in the pedals?

Originally Posted by zinc-vert02

motor mount? u joint? trans mount?

I was thinking U joint after doing some searches but i found so many different causes of clunking and squeking.

P.S. How do i quote everybody?

ReverendDexter · September 21st, 2011, 03:01 PM

Originally Posted by 01VBmustang

I do feel something in my clutch pedal but i dont think it is related...the clutch pedal rattles unless i lightly put my foot on it. I think my cable might be stretched b/c my clutch pedal actually sits about an inch or so above the others- i think i should adjust that haha

That's actually normal, and you want some play (~1/4") in the pedal to keep it from riding on the clutch and burning out your TOB.

Originally Posted by 01VBmustang

And Reverend, no brake work has been recently.

You still may have lost one of those clips. If it is the brakes, at low speed you'll get a clunk every time you tap or release the brake pedal (as the caliper bangs around in the bracket).

Originally Posted by 01VBmustang

P.S. How do i quote everybody?

See the button next to "Quote" that just has a "-" in it? That's multi-quote. Just hit that on all the posts you want to quote but the last one, and hit the normal quote on that.

probiker427 · September 21st, 2011, 11:46 PM

ball joints maybe?

2Slow4U · September 24th, 2011, 04:20 PM

I would bet on a motor mount based on the noise you are describing. With the Park brake set tight, let out on the clutch(In Gear) while somone else observes your engine to see if there is excessive engine movement under load. They meight even hear the clunk....just a thought.....Make sure there is nothing in front of the vehicle...to include your second set of eyes....just in case....Good luck

September 16th, 2011, 07:21 PM	#1
01VBmustang Regular 2001 Mustang Convertible Join Date: Jan 2008 Location: Virginia Beach Posts: 153 iTrader: 0 reviews	Strange Noise. What could it be? I have a 98 cobra. It makes a strange noise that i would describe as a clunking sound. This happens when i accelerate and when i let off the gas - only in gear. If i hold a constant RPM/speed the noise is nonexistent. This noise occurs about 75 % of the time that i accelerate/decelerate. It is very annoying/embarrassing when audible. Anyone know what to start looking at or what it could be? __________________ BBK CAI. H pipe/dual flows. 4.10s and tlok. window tint. Bullits. SCT Tuner.

September 16th, 2011, 07:31 PM	#2
cschoening09 Hardcore Enthusiast 2001 Mustang GT 9.30 @ 77mph-1/8th mile 2.2 60' Join Date: Oct 2010 Location: Council Bluffs, IA Posts: 1,695 iTrader: 3 reviews	5 speed or auto? coming from front or back? which side? start by checking your lug nuts..mine was doing the same a month or so ago and i thought it was a u joint. turned out that the drivers side lugs on the rear were loose and had bout half an inch of play in the wheel lol. other than that it sounds like u joints to me. thats what i would put the bet on __________________ 01 GT. 5spd , 03-04 cobra clutch, on its 2nd 4.6l motor2nd tr3650 too,JLT CAI,UPR o/r x, magnapack catback, predator tuned, H&R ss 10.5" bullitts w/ nt555r DR's

September 16th, 2011, 07:38 PM	#3
01VBmustang Regular 2001 Mustang Convertible Join Date: Jan 2008 Location: Virginia Beach Posts: 153 iTrader: 0 reviews	5 Speed. Ill check that out man, thanks. Its actually kind of hard to tell which side, ill pay more attention to it the next time im out. __________________ BBK CAI. H pipe/dual flows. 4.10s and tlok. window tint. Bullits. SCT Tuner.

September 20th, 2011, 08:22 PM	#4
01VBmustang Regular 2001 Mustang Convertible Join Date: Jan 2008 Location: Virginia Beach Posts: 153 iTrader: 0 reviews	So the noise seems to be coming from the front of the passenger side of the car.. Again it is a clunking/ squeking sound. Anyone else had a similar experience or know what could cause this? __________________ BBK CAI. H pipe/dual flows. 4.10s and tlok. window tint. Bullits. SCT Tuner.

September 21st, 2011, 01:42 AM	#5
Thumbie Hardcore Enthusiast 2001 Cobra 14.2@102 (I suck) Join Date: Apr 2009 Location: SF Bay Area, CA Posts: 1,621 iTrader: 0 reviews	I think I am having the EXACT same problem haha. Can you almost feel it in the pedals? __________________ 2001 Cobra with SRA swap, modded for twisties MM Cobra Club Member #76

September 21st, 2011, 01:21 PM	#6
1989Gt. Hardcore Enthusiast 1989 Mustang GT Join Date: Apr 2008 Posts: 2,797 iTrader: 0 reviews	tranny mount loose?

September 21st, 2011, 01:27 PM	#7
95Slobra Regular 1995 Mustang Gt Join Date: Sep 2011 Location: raleigh Posts: 218 iTrader: 0 reviews	loose exhaust?? hanger broke off exhaust is what it sounds like __________________ *95' GT, Trickflow setup, Aluminum heads with 1:6 roller rockers, e303 cam, BBK shorties into Magnaflow exhaust, BBK cold air intake with 75maf, Highperformance waterpump w/ electric fans*

September 21st, 2011, 02:26 PM	#9
zinc-vert02 Bringing Yellow Back 2002 mustang gt 12.2 at 117 Join Date: Apr 2010 Location: WISCONSIN Posts: 9,963 iTrader: 1 reviews	motor mount? u joint? trans mount? __________________ SOON TO BE 5.4 3V POWERD WITH A ROUSH CHARGER HELPING IT BAMA Performance Drag Team Member #4

September 21st, 2011, 11:46 PM	#13
probiker427 Newbie Join Date: Mar 2010 Posts: 5 iTrader: 0 reviews	ball joints maybe?

September 24th, 2011, 04:20 PM	#14
2Slow4U Newbie 2010 Mustang GT UNK Join Date: Sep 2008 Location: Fayetteville NC Posts: 23 iTrader: 0 reviews	I would bet on a motor mount based on the noise you are describing. With the Park brake set tight, let out on the clutch(In Gear) while somone else observes your engine to see if there is excessive engine movement under load. They meight even hear the clunk....just a thought.....Make sure there is nothing in front of the vehicle...to include your second set of eyes....just in case....Good luck

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