Clunking noise

ovalandrover · Oct 9, 2013

Could it be the Viscous coupling?

simonmorgan · Oct 12, 2013

Right lads took props off again, rechecked everything and there is no play at all re-greased and re fitted and took it for a drive and noise is still there doing my head in proper.

wil2813 · Oct 12, 2013

front diff

Nickpen · Oct 12, 2013

How close does your exhaust pipe run past the cross beam, if the engine mount rubbers are getting tired the engine could be flexing far enough to bang the exhaust pipe on the beam, I know on my 4.6 petrol there's not much clearence.

simonmorgan · Oct 12, 2013

Nickpen said:
How close does your exhaust pipe run past the cross beam, if the engine mount rubbers are getting tired the engine could be flexing far enough to bang the exhaust pipe on the beam, I know on my 4.6 petrol there's not much clearence.

Good point I never checked that will have a look 2moro and see cheers

simonmorgan · Oct 12, 2013

wil2813 said:
front diff

If it was the diff would it not make noise constantly it only does it when going up a hill or u put ur foot down a bit ?

martynv8 · Oct 12, 2013

simonmorgan said:
If it was the diff would it not make noise constantly it only does it when going up a hill or u put ur foot down a bit ?

My diff failure started exactly the same way. Eventually it started to make a constant noise & became more obvious.

eek55 · Oct 12, 2013

Transfer box chain? If it starts to slip, it makes a machine gun noise under load.

simonmorgan · Oct 13, 2013

Should there be any movement in the front diff, when I took the prop off you can turn the diff a little each way ?

Grit Valve · Oct 13, 2013

simonmorgan said:
Should there be any movement in the front diff, when I took the prop off you can turn the diff a little each way ?

Yes it will turn a little left to right, its if it moves up and down and side to side you need to worry .

simonmorgan · Oct 13, 2013

Grit Valve said:
Yes it will turn a little left to right, its if it moves up and down and side to side you need to worry .

Hi mate there is no movement like that just left and right turning, I looked at the transfer box but that sound as mentioned earlier is not the same. If wouldn't be anything within the gearbox would it ?

mutsnutz · Oct 13, 2013

why not take it to a garage and get it checked just to be sure

simonmorgan · Oct 13, 2013

mutsnutz said:
why not take it to a garage and get it checked just to be sure

As I was hoping to get it sorted myself without forking out at garage

Grit Valve · Oct 13, 2013

simonmorgan said:
Hi mate there is no movement like that just left and right turning, I looked at the transfer box but that sound as mentioned earlier is not the same. If wouldn't be anything within the gearbox would it ?

Only things that usualy make noise can be the transfer box chain rattle. Or the torq converter clutches within the unit can get noisy do does the noise change note with gear changes or remain the same . By the way the transfer box rattle would usualy be at idel no load applied

You have an auto yes.

simonmorgan · Oct 13, 2013

Grit Valve said:
Only things that usualy make noise can be the transfer box chain rattle. Or the torq converter clutches within the unit can get noisy do does the noise change note with gear changes or remain the same . By the way the transfer box rattle would usualy be at idel no load applied

You have an auto yes.

I am starting to think it might be gearbox as today when I put my foot down it still made the clunking noise, but it also hesitated before if changed down then jerked forward.

zzr1200 · Oct 13, 2013

As stated before theres a possibility that maybe the transfer box chain.

Does it make the noise if you,

1. accelerate gentle
2 accelerate hard
3. under power up a steepish hill

Is it one clunk or a series of clucks ie:machine gunning?

simonmorgan · Oct 13, 2013

zzr1200 said:
As stated before theres a possibility that maybe the transfer box chain.

Does it make the noise if you,

1. accelerate gentle
2 accelerate hard
3. under power up a steepish hill

Is it one clunk or a series of clucks ie:machine gunning?

The sound is only there when u accelerate hard or up a steep incline, no noise at idle or if u just pull off slowly or cruising it's only when u accelerate hard. The noise is more like a series of clunks which stops if u ease up or becomes louder and more frequent if u push it more cheers

zzr1200 · Oct 13, 2013

simonmorgan said:
The sound is only there when u accelerate hard or up a steep incline, no noise at idle or if u just pull off slowly or cruising it's only when u accelerate hard. The noise is more like a series of clunks which stops if u ease up or becomes louder and more frequent if u push it more cheers

How many miles has the vehicle done and is it likely to have done much towing?

simonmorgan · Oct 13, 2013

It's coming upto 118,000 at the mo it's never really towed anything, the odd trailer now and again but nothing major ?

zzr1200 · Oct 13, 2013

Theres a possibility it could well be the transfer chain the only way I can think of checking it, would be to disconnect both propshafts at the transfer box end, with the main gearbox in park, handbrake off and see how much rotational movement is in the rear output shaft.

118,000 mls seems a bit low to me but its a possibility.

But I don't know how much movement there is with a good chain.
A replacement chain is 70.00 + vat

Transfer Box Drive Chain (Allmakes) STC3238 Island 4x4 - Specialists in Land Rover and Range Rover Parts and accessories for all models. UK and worldwide mail order.

Clunking noise

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