Disco mechanical clunk - any ideas?

Andy uttered summat worrerz funny about:

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

Lee D

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 enlightened us thusly:

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.

||| 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.

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.... :-)