Weird rattle coming from underneath

[Brucie]

Hi, all

I am hoping someone maybe able to help me figure out what this rattle noise is coming from underneath my car.

It can only be heard when off the throttle, slowing down below 30kmh.
It almost sounds like a plate/shield.

It can only be heard when the windows are down

There is no noticeable change is drive or anything.

It started after have my front wheel hubs changed out for some second hand ones.

Please help it's making my car sound like a POS.

[Graeme]

Is the heat shield above the muffler loose?

[Brucie]

Is the heat shield above the muffler loose?

Thanks i will have to check that once the kids are in bed

[jwb]

More than likely the hand brake shoes rattling.

Try gently pulling on the hand brake a couple of notches and see if it stops it, then if it does search on here for fix.

[Brucie]

Is the heat shield above the muffler loose?
Fingers crossed that was it. Hopped under her after work, she was flopping around like a you know what in a sleeve.

Thankyou

[trout1105]

I had a simmilar sound coming from under my D2a just before the output bearing in the transfer case carked it.
Have a look at that before you celebrate [thumbsupbig]

[Brucie]

I had a simmilar sound coming from under my D2a just before the output bearing in the transfer case carked it.
Have a look at that before you celebrate [thumbsupbig]


After a small drive, I think that maybe may next point of call.
Would you not feel it while driving though?
I hope not, is it a big job replacing that?

[trout1105]

After a small drive, I think that maybe may next point of call.
Would you not feel it while driving though?
I hope not, is it a big job replacing that?

There was no noticable vibration until the bearing got really bad and I had to have the transfer case rebuilt.
I actally thought it was just a bit of wire jamed up under there because I had done a fair bit of paddock work at that time chasing sheep and it was what it souded like.
No wonder I couldn't find the wire when I searched under the car.

[Graeme]

It started after have my front wheel hubs changed out for some second hand ones.

Check for a loose hub nut.

[AK83]

Another easy thing to look for underneath, if nothing obvious is loose(like the muffler heat shield or handbrake) ... are the disc brake mud shields(could be just one or more).
They're held on with the tiniest little screws and can cause a metallic rattle.

[354 chamberlain]

check the vibration damper bolted to the transfer case. I had a rattle coming from underneath at idle and it sounded like the toque converter wanted to exit via the bell housing , so I just gave it the kodak treatment (wait for it to develop) . Noise continued for over 2 years until I was checking the uni joints and found the damper was slightly loose , tightened up the bolt and the torque converter fixed its self

[vbrab]

For months I have had a noise that sounds like something touching as engine /fan rotates.
Starts at about 2000 rpm and ceases at 2400, and I cannot hear it when in top (auto).
Sounds more like a "clattering" that more happen if say a blade was touching something as it rotated.
Have checked all over nothing loose, nothing touching, no loose heat shields.
From drivers seat sound appears to be coming from left of centre nearer the firewall rather than up near engine front

If I place my hand on the high/low range selector I can sort of feel a vibration that matches the noise am hearing.
Vibration through H/L selector stops when noise stops.
Cannot see anything loose on H/L linkages ect (but bit hard to get close up to). I do have a scope if there is some place I should be looking.

I was thinking something to do with torque convertor/drive plate (from the sound of it), but it has gone on so long I doubt it is in that department.
Has near new engine mounts, but original gear box mount. Do gear box mounts perhaps add noises /vibrations?

Just an annoying noise, but I'd like it gone if anybody can suggest what to look at.

[vbrab]

Is the heat shield above the muffler loose?

My heat shield above muffler is loose (just sits off the body on its mount bolts, but not tight up against the underbody), would that deliver a rattling noise that starts at 2100 revs but disappears at 2400rpm?

[Graeme]

Jamb something between the shield and floor then check if the rattle stops.

If the flexible joint in the exhaust just below the turbo is a bellows type then the bellows eventually stretches leaving the lower end to rattle on the internal limit stop.

[vbrab]

Jamb something between the shield and floor then check if the rattle stops.

If the flexible joint in the exhaust just below the turbo is a bellows type then the bellows eventually stretches leaving the lower end to rattle on the internal limit stop.

I do have the flexible bellows, noise does appear to come from that direction.
The front pipe is only about 40k old as did away with front muffler when re-mapped and fitted new pipe.
Maybe a bunky bellows.
Will look.

[singlecell]

For months I have had a noise that sounds like something touching as engine /fan rotates.
Starts at about 2000 rpm and ceases at 2400, and I cannot hear it when in top (auto).
Sounds more like a "clattering" that more happen if say a blade was touching something as it rotated.
Have checked all over nothing loose, nothing touching, no loose heat shields.
From drivers seat sound appears to be coming from left of centre nearer the firewall rather than up near engine front

If I place my hand on the high/low range selector I can sort of feel a vibration that matches the noise am hearing.
Vibration through H/L selector stops when noise stops.
Cannot see anything loose on H/L linkages ect (but bit hard to get close up to). I do have a scope if there is some place I should be looking.

I was thinking something to do with torque convertor/drive plate (from the sound of it), but it has gone on so long I doubt it is in that department.
Has near new engine mounts, but original gear box mount. Do gear box mounts perhaps add noises /vibrations?

Just an annoying noise, but I'd like it gone if anybody can suggest what to look at.

I have what sounds to be the same as yours. Mine is coming from the hand brake. I can remove the noise by gently pulling on the hand brake during that rev range the rattle disappears.

[vbrab]

I had a simmilar sound coming from under my D2a just before the output bearing in the transfer case carked it.
Have a look at that before you celebrate [thumbsupbig]

I am optimistic that hopefully not transfer case bearing as transfer case fully rebuilt by very reliable trans guys less than 25k ago.....but stuff does happen.
I ONLY get the noise (which sounds like resonance linked to revs rather than rumble or anything actually hitting) between 200-2400 rpm, and once it in top, sweet as.
As noise appears to emanate from passenger side near front exhaust pipe i am inclined to think (hope) that is as others mention, possibly loose flexible lining in flexible area on front pipe.
I recently gave away a new front pipe, damn!!

[Geoff86RRC]

On my 99 TD5 D2, I had a very pronounced rattle when accelerating from stopped. If I pulled the handbrake on slightly then it would stop. I had new handbrake shoes inside the drum fitted and everything was fine after that as far as rattles go.

on my 2000 V8 D2, there was a type or flange behind the harmonic balancer which was rattling. I cut it out and that stopped. Good luck

1999 td5 Oxford blue 365k 6 seat rear aircon

TJM bar, rear bar, ECB rack, Hdi lights, Aldi 9” LED Spots, vhf 4.5db, EGR blank, ACE disabled, rear bags removed, reverse camera, in line thermostat, engine watchdog, brass diff plugs, Tfr case done, auto done, amigos away making trouble elsewhere, (HSE interior and CDL next)

[Geoff86RRC]

More than likely the hand brake shoes rattling.

Try gently pulling on the hand brake a couple of notches and see if it stops it, then if it does search on here for fix.

Agreed