Disco mechanical clunk - any ideas?

I have a 2001 Disco 2 TD5 Auto, every day when I set off from home and pull
out from the hilly estate where I live onto a long straight I hear a fairly
loud 'clunk' from the front of the car. It happens only once and is usually
when settling into a cruise of around 30-40mph. Initially I thought it maybe
the auto box changing down but have ruled this out. Does anyone know of any
component on a D2 that moves/engages/disengages whilst cruising? The car is
fitted with ACE but as I the noise doesn't occur when cornering I doubt this
is the cause? It is really puzzling me and as I am off to France in a
fortnight I really need to be sure that there isn't a more serious fault
developing.

Any help greatly appreciated.

Andy

Andy <[email protected]> uttered summat worrerz funny about:
> I have a 2001 Disco 2 TD5 Auto, every day when I set off from home
> and pull out from the hilly estate where I live onto a long straight
> I hear a fairly loud 'clunk' from the front of the car. It happens
> only once and is usually when settling into a cruise of around
> 30-40mph. Initially I thought it maybe the auto box changing down but
> have ruled this out. Does anyone know of any component on a D2 that
> moves/engages/disengages whilst cruising? The car is fitted with ACE
> but as I the noise doesn't occur when cornering I doubt this is the
> cause? It is really puzzling me and as I am off to France in a
> fortnight I really need to be sure that there isn't a more serious
> fault developing.
> Any help greatly appreciated.
>
> Andy

Is it route specific or does it do it on every trip from cold? Could be
something as silly as exhaust expansion.

Lee D

> I have a 2001 Disco 2 TD5 Auto, every day when I set off from home and pull
> out from the hilly estate where I live onto a long straight I hear a fairly
> loud 'clunk' from the front of the car. It happens only once and is usually
> when settling into a cruise of around 30-40mph. Initially I thought it maybe
> the auto box changing down but have ruled this out. Does anyone know of any
> component on a D2 that moves/engages/disengages whilst cruising? The car is
> fitted with ACE but as I the noise doesn't occur when cornering I doubt this
> is the cause? It is really puzzling me and as I am off to France in a
> fortnight I really need to be sure that there isn't a more serious fault
> developing.

Most obvious thing given it is an auto would be the torque converter
locking up, and can happen with a bit of a bang - but not sure if this
would happen at 30-40, would expect it to happen at a higher cruising
speed - tho I have not driven a Td5 auto myself for any length of time
so maybe it does??

Matt

On or around Tue, 01 Aug 2006 14:04:39 +0200, Matthew Maddock
<[email protected]> enlightened us thusly:

>> I have a 2001 Disco 2 TD5 Auto, every day when I set off from home and pull
>> out from the hilly estate where I live onto a long straight I hear a fairly
>> loud 'clunk' from the front of the car. It happens only once and is usually
>> when settling into a cruise of around 30-40mph. Initially I thought it maybe
>> the auto box changing down but have ruled this out. Does anyone know of any
>> component on a D2 that moves/engages/disengages whilst cruising? The car is
>> fitted with ACE but as I the noise doesn't occur when cornering I doubt this
>> is the cause? It is really puzzling me and as I am off to France in a
>> fortnight I really need to be sure that there isn't a more serious fault
>> developing.
>
>Most obvious thing given it is an auto would be the torque converter
>locking up, and can happen with a bit of a bang - but not sure if this
>would happen at 30-40, would expect it to happen at a higher cruising
>speed - tho I have not driven a Td5 auto myself for any length of time
>so maybe it does??

pretty unlikely at below 40. Try holding the 'box manually in 3, and drive
otherwise the same - see if it occurs then. That'll eliminate torque
converter things, even if it does lock up that low.

suspension stuff could be worth a look - joints and bushes and so on.
--
Austin Shackles. www.ddol-las.net my opinions are just that
Appearances: You don't really need make-up. Celebrate your authentic
face by frightening people in the street.
from the Little Book of Complete B***ocks by Alistair Beaton.

Matthew Maddock wrote:

||| I have a 2001 Disco 2 TD5 Auto, every day when I set off from home
||| and pull out from the hilly estate where I live onto a long
||| straight I hear a fairly loud 'clunk' from the front of the car. It
||| happens only once and is usually when settling into a cruise of
||| around 30-40mph. Initially I thought it maybe the auto box changing
||| down but have ruled this out. Does anyone know of any component on
||| a D2 that moves/engages/disengages whilst cruising? The car is
||| fitted with ACE but as I the noise doesn't occur when cornering I
||| doubt this is the cause? It is really puzzling me and as I am off
||| to France in a fortnight I really need to be sure that there isn't
||| a more serious fault developing.
||
|| Most obvious thing given it is an auto would be the torque converter
|| locking up, and can happen with a bit of a bang - but not sure if
|| this would happen at 30-40, would expect it to happen at a higher
|| cruising speed - tho I have not driven a Td5 auto myself for any
|| length of time so maybe it does??
||
|| Matt

The TC locks up at about 52-53mph, so I doubt if it would be that.

--
Rich
==============================

I don't approve of signatures, so I don't have one.

Check the propshaft nuts and bolts.

Took me ages to track down that clunk on my Series One!

"Rory" <[email protected]> wrote in message
news:[email protected]...
> Check the propshaft nuts and bolts.
>
> Took me ages to track down that clunk on my Series One!
>

I am beginning to think it's suspension related, been to Langdale Quest
off-road site today and it was knocking over all the bumps.

Check your anti-roll bar bushes.......the fronts go on the TD5's quite
quickly for some reason. Easy to check - look at front while someone rocks
the vehicle....

--
Neil