Please Help! clunk sound when accelerating

skidze · June 4th, 2009, 03:52 PM

Please read all- I have a 2002 Mustang GT with a manual tranny, and I have noticed that over the last month or so when I give a sudden strike of the accelerator that I hear a "clunk" noise coming from the passenger side. I just got 410's installed and like to accelerate quite often at low-rpms to feel them, and thats when i seem to hear the "clunk" noise. It happens once, and then goes away, and only happens when a large load is put on the engine like when I get on it in 1rst shift into 2nd (clunk) shift into 3rd (clunk) and so on. It does not do it when just cruising, only under hard acceleration. I stopped in my driveway with it running and popped the hood, and goosed it a few times. I would say that 3 outta the 5 times I did it, it made the noise. It seems to be coming from the passenger side rear part od the engine or underneith. Is this normal? Its not ridiculously loud, but notice-able with windows down or up. Keep in mind this car only has 22k miles on it, and sat in a garage for 3 years solid.

moosenuk17 · June 4th, 2009, 04:02 PM

its because you are dumping the clutch and its snapping the driveline/tranny/rear end, dont worry about it.

2kGT · June 4th, 2009, 04:12 PM

Originally Posted by moosenuk17

its because you are dumping the clutch and its snapping the driveline/tranny/rear end, dont worry about it.

I doubt he was doing that if he was stopped in his driveway LOL

competition orange · June 4th, 2009, 04:18 PM

i would check your motor mounts

Black Bullitt · June 4th, 2009, 04:30 PM

Any aftermarket exhaust? If so check all of your bolts and hangers to make sure it's secure.

Dolbs4082 · June 4th, 2009, 04:39 PM

sounds to me kinda like back-lashing in the rear axel (not too much to worry about untill it starts getting bad.) mines doing it really loud everytime i back up or start off. so im going to rebuild the rear end now. haha

competition orange · June 4th, 2009, 04:51 PM

if it does it when your car is sitting still too then i would say motor mount or if you got after market h or x pipe maybe its hitting agaist floor of car but how you described where sound comes from then its your motor mount.jack engine up(make sure you put piece of wood between jack an oil pan)just until you see it lift alittle then grab engine and try to rock side to side it should only move a very little bit.hope that helps

skidze · June 4th, 2009, 05:18 PM

this all helps some guys, thanks. the engine and exhaust is bone stock. maybe it is a motor mount/trans mount. and it does this running while in neautral as well

moosenuk17 · June 4th, 2009, 05:54 PM

Originally Posted by 2kGT

I doubt he was doing that if he was stopped in his driveway LOL

hahaha, damn it, should have read all of it haha, he warned me...lol

Lefty · June 4th, 2009, 06:47 PM

Check to see if there's any play in the U-Joints.

Sideways Stang · June 4th, 2009, 11:04 PM

Originally Posted by Lefty

Check to see if there's any play in the U-Joints.

Wouldn't be U-joints if it did it in neutral. My money is on the motor mounts.

mrsinister2424 · June 5th, 2009, 12:56 AM

Originally Posted by 2kGT

I doubt he was doing that if he was stopped in his driveway LOL

You're not supposed to?

Lefty · June 5th, 2009, 08:29 AM

Originally Posted by Sideways Stang

Wouldn't be U-joints if it did it in neutral. My money is on the motor mounts.

I didn't really read his whole "sch peal". I saw "clunking" and motor mounts was already posted so I threw in U-Joints because usually clunking is either motor mounts or u-joints.

Sorry about that

2kGT · June 5th, 2009, 09:08 AM

Originally Posted by mrsinister2424

You're not supposed to?

well its really more of a safety issue, but hey, who am I to judge, LOL

Yellow02GTauto · June 5th, 2009, 09:39 AM

The tranny mount would be my guess.....it is usually the first to go........

"ED"

June 4th, 2009, 03:52 PM	#1
skidze Regular 2003 Mustang GT N/A Join Date: Dec 2007 Location: shittown Posts: 69 iTrader: 0 reviews	Please Help! clunk sound when accelerating Please read all- I have a 2002 Mustang GT with a manual tranny, and I have noticed that over the last month or so when I give a sudden strike of the accelerator that I hear a "clunk" noise coming from the passenger side. I just got 410's installed and like to accelerate quite often at low-rpms to feel them, and thats when i seem to hear the "clunk" noise. It happens once, and then goes away, and only happens when a large load is put on the engine like when I get on it in 1rst shift into 2nd (clunk) shift into 3rd (clunk) and so on. It does not do it when just cruising, only under hard acceleration. I stopped in my driveway with it running and popped the hood, and goosed it a few times. I would say that 3 outta the 5 times I did it, it made the noise. It seems to be coming from the passenger side rear part od the engine or underneith. Is this normal? Its not ridiculously loud, but notice-able with windows down or up. Keep in mind this car only has 22k miles on it, and sat in a garage for 3 years solid.

June 4th, 2009, 04:02 PM	#2
moosenuk17 MM Fanatic 2000 ford mustang GT Join Date: Apr 2008 Location: san diego CA Posts: 4,011 iTrader: 0 reviews	its because you are dumping the clutch and its snapping the driveline/tranny/rear end, dont worry about it. __________________ 2000 kenne bell GT (440HP-432TQ) Tuned by Joe at http://www.tricktuners.com dyno vid:http://youtu.be/lr3xpxw2_v8 2011 escape MUSTANG TAT CREW

June 4th, 2009, 06:47 PM	#10
Lefty Resident DJ '01 Cobra Vert. Join Date: Jun 2007 Location: Mechanicsburg, PA Posts: 28,699 iTrader: 12 reviews	Check to see if there's any play in the U-Joints. __________________ 2008 Acura TL Type-S (the daily) 2006 Yamaha R6 50th Anniversary Edition (the other toy)

June 5th, 2009, 09:39 AM	#15
Yellow02GTauto Regular 2002 Mustang GT 4R70W 11.65@115.86 2V N/A Join Date: Mar 2009 Location: Raeford, NC Posts: 433 iTrader: 0 reviews	The tranny mount would be my guess.....it is usually the first to go........ "ED" __________________ "You gonna let an Automatic beat ya?" 2002 Zinc Yellow GT 355 HP/348 TQ N/A TFS 44cc heads,Stage 3 cams, Forged-Aluminum block, 9.3 CR, full exhaust and bolt ons 11.65@115.86 so far built to handle 1000hp....

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June 4th, 2009, 04:18 PM	#4
competition orange Regular 2004 mustang gt Join Date: Feb 2008 Location: uniontown,pennslyvania Posts: 368 iTrader: 1 reviews	i would check your motor mounts

June 4th, 2009, 04:39 PM	#6
Dolbs4082 I Blumpkin Entirely Way Too Much 2005 Mustang GT Join Date: Dec 2008 Location: kansas Posts: 5,958 iTrader: 0 reviews	sounds to me kinda like back-lashing in the rear axel (not too much to worry about untill it starts getting bad.) mines doing it really loud everytime i back up or start off. so im going to rebuild the rear end now. haha

June 4th, 2009, 04:51 PM	#7
competition orange Regular 2004 mustang gt Join Date: Feb 2008 Location: uniontown,pennslyvania Posts: 368 iTrader: 1 reviews	if it does it when your car is sitting still too then i would say motor mount or if you got after market h or x pipe maybe its hitting agaist floor of car but how you described where sound comes from then its your motor mount.jack engine up(make sure you put piece of wood between jack an oil pan)just until you see it lift alittle then grab engine and try to rock side to side it should only move a very little bit.hope that helps

June 4th, 2009, 05:18 PM	#8
skidze Regular 2003 Mustang GT N/A Join Date: Dec 2007 Location: shittown Posts: 69 iTrader: 0 reviews	this all helps some guys, thanks. the engine and exhaust is bone stock. maybe it is a motor mount/trans mount. and it does this running while in neautral as well

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