What do you think this noise is

[Tacchino]

I've got a sound coming from the rear of the car - sounds like the diff area.

It's not a dull clunk but more of a higher pitched clicking sound.
There's also a jolt felt through the chassis at the same time that feels like a shock absorber set to rock hard and you've just run over a stone.

This only occurs when letting off the throttle and not necessarily when the cars being given the beans.
No noise/jolt whatsoever on taking up drive.

Diff bushes were replaced before I bought the car - less than 2000 miles ago.

Any clues where to start looking?

[Jhonno]

CV?

Diff bolts done up correctly?

[scotty_d]

As well as above. Check the rear upper wishbone bush's Mine are going and sound a little like that just now i can get some play in mine with a pry bar so will be changing them over winter.

[Cerbieherts]

Also check the propshaft bolts at the diff, they are fiddly to tighten and I've come across them working loose as a consequence..

[Ireland]

Cracked ARB mounting bracket?

Broken drop-link?

I've had both happen on mine and the sound each time could possibly be described as being similar to the OPs description.

[Tacchino]

Thanks guys.

I reckon I've got a weekend underneath her with a set of sockets, spanners, torch, pry bar, patience and a swear box.
At least no ones said "they all do that sir".

[DAVEY DEE]

Don't worry about it.....they all do that sir!

[Tacchino]

Kerching .....

[billy no brakes]

Tacchino said:

I've got a sound coming from the rear of the car - sounds like the diff area.

It's not a dull clunk but more of a higher pitched clicking sound.
There's also a jolt felt through the chassis at the same time that feels like a shock absorber set to rock hard and you've just run over a stone.

This only occurs when letting off the throttle and not necessarily when the cars being given the beans.
No noise/jolt whatsoever on taking up drive.

Diff bushes were replaced before I bought the car - less than 2000 miles ago.

Any clues where to start looking?

This has been discussed on many occasions and is normally the pads rattling up and down the disc,s, try this drive the car and take your foot of the loud pedal and if you can haer the clicking then 9 times out of 10 its the pads then put you foot gently on the brakes and it stops bobs your uncle it is the pads, best way I have found to stop it after various fixes is to silicone the pads to the piston you will need heat resistant silicone though, good luck

Gary

[Cerbieherts]

Why would the pads rattle on over-run without applying the brake? Doesn't make sense......?

[billy no brakes]

because the holes in the pads are bigger than the holes in the calipers where the split pins go, so they jump up and down hiting the dics and make a sound a bit like castonets but when you apply the brakes pressure is put ot the pad stoping them jumping up and down, this is nothing knew trust me I have had my Cerbera 14 years and know most of its niggles

[Mad Mark]

Check the centre Diff bush bracket. It is common for them to break and can often only been seen that they are broken once they are removed and fall apart.
Do a search on here for them there has been many threads about them.

[high52kojak]

If it was the pads rattling I don't think you'd feel a jolt through the chassis.
Simple test to see if its the pads is just lightly apply the footbrake when you hear the sound, If the sound stops on applying the brakes, then you have loose pads.

But it sounds like maybe a diff part or C/V joint problem.

[ridds]

Along with the above, check your front diff plates.

Mine had worked loose and then the holes had opened up. This allowed the diff to move so far that the CV joint bolts hit the chassis! That could make a similar noise to what you are hearing and would be felt.