Thumping noise - TriStateTuners.com :: Home of Tristate Auto Enthusiast

lagos · 04-03-2009, 06:28 PM

Im getting a thumping noise on deceleration only. It sounds very similar to the noise you would hear if you had a flat tire. It is mostly noticeable when decelerating in 3rd gear, right around 2,000 rpm. Its hard to pinpoint if its coming from the front or the rear of the car, because of the way the noise resonates though the whole car.

My original diagnosis was that my axle that had been leaking grease was the cause of the noise, but I swapped the axle out for a brand new one (needed to be done sooner or later anyway), but the thumping persists. Motor mounts are fine too.

Any ideas?

russiankid · 04-03-2009, 06:31 PM

Check your exhaust hangers? If it comes and goes with engine noise thats the only thing I can think of. Suspension noise wouldn't really matter on engine speed.

Renegade_ · 04-03-2009, 06:34 PM

Balljoints?

russiankid · 04-03-2009, 06:34 PM

His ball joints must be shot to hell if he hears them on deceleration.

lagos · 04-03-2009, 06:35 PM

Yeah the exhaust is hanging just fine. Motor mounts are fine, and one axle is new while the other one seems to be in great shape.
I need to recruit someone to go for a ride with me to try to hear where the noise is coming from. Driving, its almost impossible to pinpoint.

There is some up/down freeplay in the drivers side axle that does make a clunk when you push up on it, but I THINK I remember there always being some play there... who knows. If that was the case it would be a diff issue, but I have a feeling its something more simple then that.

russiankid · 04-03-2009, 06:37 PM

If you're going to be at Exton tonight I can ride along.

twastheglow · 04-03-2009, 06:37 PM

Quote:

Originally Posted by Renegade_

Balljoints?

x2. I would check those. I can't imagine anything else "clunking" like that.

lagos · 04-03-2009, 06:42 PM

I doubt its the balljoints as the sound is not really coming from one side of the car.
I wish I had a lift so that I could just look over everything.

twastheglow · 04-03-2009, 06:57 PM

Quote:

Originally Posted by lagos

I doubt its the balljoints as the sound is not really coming from one side of the car.
I wish I had a lift so that I could just look over everything.

How can you tell it's not coming from one side of the car if you can't tell if it's coming from the front or back?

lagos · 04-03-2009, 06:59 PM

Quote:

Originally Posted by twastheglow

How can you tell it's not coming from one side of the car if you can't tell if it's coming from the front or back?

Hahaha good point.

But from what I can tell, the noise is in the center of the car. Like an inner axle thumping or something in the trunk. Doesnt seem like its from one side, but who knows.

twastheglow · 04-03-2009, 07:05 PM

Quote:

Originally Posted by lagos

Hahaha good point.

But from what I can tell, the noise is in the center of the car. Like an inner axle thumping or something in the trunk. Doesnt seem like its from one side, but who knows.

Wheel bearings?

Renegade_ · 04-03-2009, 07:07 PM

Those are more like a roar and scraping...

I would say check stuff like rear diff bushings but....

Check shifter linkage/bushings? Only thing in the center of the car I can think of

twastheglow · 04-03-2009, 07:10 PM

Did you run over a hooker?

lagos · 04-03-2009, 07:18 PM

Quote:

Originally Posted by twastheglow

Did you run over a hooker?

OMG you figured it out !

twastheglow · 04-03-2009, 07:19 PM

Quote:

Originally Posted by lagos

OMG you figured it out !

Then drive to a ****ty part of town, scrape that bitch off and keep on keeping on.

scutzi128 · 04-04-2009, 03:24 AM

I know this is stupid but make sure all you lugs are tight. I had a thumping a while ago and it turned out my lugs were loose on a wheel. BTW I saw a Celica all trac the other day. I don't know if they are super rare though.

lagos · 04-04-2009, 12:48 PM

Quote:

Originally Posted by scutzi128

I know this is stupid but make sure all you lugs are tight. I had a thumping a while ago and it turned out my lugs were loose on a wheel. BTW I saw a Celica all trac the other day. I don't know if they are super rare though.

Thats a good idea and one of the first things I checked.

Celica Alltrac, rare? Well, they only made 1500 of them from 1990-1993. So id say yes.

scutzi128 · 04-04-2009, 10:27 PM

lol I should have taken a pic

ross cox · 04-12-2009, 02:24 AM

Could be the centre bearing in your tailshaft?
Cheers
Ross

lagos · 04-12-2009, 12:20 PM

I think my differential bearing is on its way out...
http://www.youtube.com/watch?v=nHrM0HpqNpA

04-03-2009, 06:28 PM	#1
lagos Tri-State Post Whore Join Date: Oct 2005 Location: Philadelphia, PA Member #989 My Ride: Toyota Celica GT-Two iTrader: (0)	Thumping noise Im getting a thumping noise on deceleration only. It sounds very similar to the noise you would hear if you had a flat tire. It is mostly noticeable when decelerating in 3rd gear, right around 2,000 rpm. Its hard to pinpoint if its coming from the front or the rear of the car, because of the way the noise resonates though the whole car. My original diagnosis was that my axle that had been leaking grease was the cause of the noise, but I swapped the axle out for a brand new one (needed to be done sooner or later anyway), but the thumping persists. Motor mounts are fine too. Any ideas? __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. The accelerator on my toyota has always been stuck to the floor.. To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. Last edited by lagos; 04-03-2009 at 06:31 PM.

04-03-2009, 06:31 PM	#2
russiankid Tri-State Post Whore Join Date: May 2008 Location: Lincoln University PA Member #7769 My Ride: 2012 Scion tC iTrader: (0)	Check your exhaust hangers? If it comes and goes with engine noise thats the only thing I can think of. Suspension noise wouldn't really matter on engine speed. __________________ 2012' Scion tC 6-speed M/T.

04-03-2009, 06:34 PM	#3
Renegade_ Tri-State Post Whore Join Date: May 2006 Location: NNJ/NYC Member #1912 My Ride: 1J Swaggon iTrader: (2)	Balljoints? __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

04-03-2009, 06:34 PM	#4
russiankid Tri-State Post Whore Join Date: May 2008 Location: Lincoln University PA Member #7769 My Ride: 2012 Scion tC iTrader: (0)	His ball joints must be shot to hell if he hears them on deceleration. __________________ 2012' Scion tC 6-speed M/T.

04-03-2009, 06:35 PM	#5
lagos Tri-State Post Whore Join Date: Oct 2005 Location: Philadelphia, PA Member #989 My Ride: Toyota Celica GT-Two iTrader: (0)	Yeah the exhaust is hanging just fine. Motor mounts are fine, and one axle is new while the other one seems to be in great shape. I need to recruit someone to go for a ride with me to try to hear where the noise is coming from. Driving, its almost impossible to pinpoint. There is some up/down freeplay in the drivers side axle that does make a clunk when you push up on it, but I THINK I remember there always being some play there... who knows. If that was the case it would be a diff issue, but I have a feeling its something more simple then that. __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. The accelerator on my toyota has always been stuck to the floor.. To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

04-03-2009, 06:37 PM	#6
russiankid Tri-State Post Whore Join Date: May 2008 Location: Lincoln University PA Member #7769 My Ride: 2012 Scion tC iTrader: (0)	If you're going to be at Exton tonight I can ride along. __________________ 2012' Scion tC 6-speed M/T.

04-03-2009, 06:42 PM	#8
lagos Tri-State Post Whore Join Date: Oct 2005 Location: Philadelphia, PA Member #989 My Ride: Toyota Celica GT-Two iTrader: (0)	I doubt its the balljoints as the sound is not really coming from one side of the car. I wish I had a lift so that I could just look over everything. __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. The accelerator on my toyota has always been stuck to the floor.. To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

04-03-2009, 07:07 PM	#12
Renegade_ Tri-State Post Whore Join Date: May 2006 Location: NNJ/NYC Member #1912 My Ride: 1J Swaggon iTrader: (2)	Those are more like a roar and scraping... I would say check stuff like rear diff bushings but.... Check shifter linkage/bushings? Only thing in the center of the car I can think of __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

04-04-2009, 03:24 AM	#16
scutzi128 Tri-State Post Whore Join Date: Oct 2007 Location: Media, PA Member #6101 My Ride: 04 STi iTrader: (0)	I know this is stupid but make sure all you lugs are tight. I had a thumping a while ago and it turned out my lugs were loose on a wheel. BTW I saw a Celica all trac the other day. I don't know if they are super rare though. __________________ 2004 WRB STi built and gt35r'd To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. Traded in for STi To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. best 1/4 of 13.5 threw a rod To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. XBL GT: Bison Lover To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

04-04-2009, 10:27 PM	#18
scutzi128 Tri-State Post Whore Join Date: Oct 2007 Location: Media, PA Member #6101 My Ride: 04 STi iTrader: (0)	lol I should have taken a pic __________________ 2004 WRB STi built and gt35r'd To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. Traded in for STi To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. best 1/4 of 13.5 threw a rod To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. XBL GT: Bison Lover To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

04-12-2009, 02:24 AM	#19
ross cox Noob-Jersey Join Date: Apr 2009 Location: Brisbane-Australia Member #13115 My Ride: Mitsubishi Galant VR4 1989 iTrader: (0)	Could be the centre bearing in your tailshaft? Cheers Ross

04-12-2009, 12:20 PM	#20
lagos Tri-State Post Whore Join Date: Oct 2005 Location: Philadelphia, PA Member #989 My Ride: Toyota Celica GT-Two iTrader: (0)	I think my differential bearing is on its way out... http://www.youtube.com/watch?v=nHrM0HpqNpA __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. The accelerator on my toyota has always been stuck to the floor.. To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

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