Bang:

[willvine]

When I go over speed bumps at approx 20 kms approx i get a bang from the rear end. I am assuming the rear wheels momentarilly break ground traction and the traction control slams the airborne wheels brakes on therefore the loud bang!!! . The disco has always done this but since fitting poly-airs has been more noticeable. also when I drive out off the servo in a hurry and miss the lay-backs , the same noise.. Any ideas would be great.

Thanks in advance.

[geoz]

do you have a rear step?

mine touched down once on a really big hump (i saw that one too late). basically as the rear suspension gets compressed by the cars weight after clearing the bump the step hits the bump.

georgie

[willvine]

do you have a rear step?

mine touched down once on a really big hump (i saw that one too late). basically as the rear suspension gets compressed by the cars weight after clearing the bump the step hits the bump.

georgie


Yea I have a rear step , but cant see any signs of recent scraping on the underside of the step.

I seem to get the noise every time the rear wheels break ground, even over a very small bump.



GO THE BLUES

[willvine]

When I go over speed bumps at approx 20 kms approx i get a bang from the rear end. I am assuming the rear wheels momentarilly break ground traction and the traction control slams the airborne wheels brakes on therefore the loud bang!!! . The disco has always done this but since fitting poly-airs has been more noticeable. also when I drive out off the servo in a hurry and miss the lay-backs , the same noise.. Any ideas would be great.

Thanks in advance.

i GUESS I should express that i have a 99 disco2 ,had rear air bags. then fited coils then fited poly airs and billies.

[Blknight.aus]

check your A Frame joints.

[tombraider]

i GUESS I should express that i have a 99 disco2 ,had rear air bags. then fited coils then fited poly airs and billies.

Did you get the extended length billies?

I bet no, and your topping your shocks over the bump.

[willvine]

check your A Frame joints.


Hey Blknight

I am shure the disco 2 doesn't have the a frame joints .

[willvine]

Did you get the extended length billies?

I bet no, and your topping your shocks over the bump.

I dont think so . but The coils and shocks were fitted by a LR specialist so I hope so. In My first post I did mention that the disco had allways done this with the factory air bags with the original shocks. so don't know why it is still doing it.

[LandyAndy]

NO A FRAME JOINTS ON A D2!!!!
OK a couple of checks.Mine was doing this on speed humps when I first got it.The watts linkage hade been re-bushed,it had been put in upside down,one of the links was hitting the diff!!!!
Next,I get clunks and bangs since my polyairs went in.My spacers dont sit flat and refuse to do so,Ive levered them to where they are meant to be but they conform to the spring pitch,Im guessing there is a possible clung here.
Also after speaking with Ken,he inherited a clunk with a new suspension kit.Im wondering if the watts link bushes are worn to one position,when disturbed with new suspension,or polyairs in your case which equates some sort of lift,the clunk may be in there!!!!
Andrew

[willvine]

The only reason why i could think it is related to the TC stopping the rear wheels is the TC light will come on for a second and i here the TC growl.

[willvine]

NO A FRAME JOINTS ON A D2!!!!
OK a couple of checks.Mine was doing this on speed humps when I first got it.The watts linkage hade been re-bushed,it had been put in upside down,one of the links was hitting the diff!!!!
Next,I get clunks and bangs since my polyairs went in.My spacers dont sit flat and refuse to do so,Ive levered them to where they are meant to be but they conform to the spring pitch,Im guessing there is a possible clung here.
Also after speaking with Ken,he inherited a clunk with a new suspension kit.Im wondering if the watts link bushes are worn to one position,when disturbed with new suspension,or polyairs in your case which equates some sort of lift,the clunk may be in there!!!!
Andrew

Hey landyAndy. I have been down the road on the Famous watts link clunk and got a bit creative one day by putting electrical tape on the watts link were it could bind with other metal only to find that there were no marks or cuts were it could touch the diff or other metel so I ruled out the watts link.

[Blknight.aus]

see thats what I get for not driving a mobile apartment..

I have the mobile shed instead its a bit more agricultural and doesnt have the go fast suspension setup...

[DEFENDERZOOK]

see thats what I get for not driving a mobile apartment..

I have the mobile shed instead its a bit more agricultural and doesnt have the go fast suspension setup...


....with a manual transmission........

[willvine]

see thats what I get for not driving a mobile apartment..

I have the mobile shed instead its a bit more agricultural and doesnt have the go fast suspension setup...


yea Maybe if i removed the missus crap from the back of the disco i wouldnt need the poly airs.

[Blknight.aus]

oooohhhh am i going to get to blame autos again?

:angel:

[shorty943]

Humour me will you? I want to try some thing, and I don't have a TC button.

SWITCH THE STUPID BLOODY TRACTION CONTROL OFF.

Ahem, and Leave it off. Then drive over your bump again.
I'll bet your bang sound goes away.

The most ridiculous DORK idea I have ever heard of. The vehicle was designed with 3, count them three, limited slip differentials. It has the Range Rover Posi-traction system. What under educated doofus decided it was a good idea, to fit a computer that keeps slamming the bloody brakes on, to a vehicle that NEEDS to be worked, to pull through the rough stuff.

Humour me please and just try it.


Shorty.

[willvine]

yea mine is a auto.

[willvine]

[QUOTE=shorty943;549853]Humour me will you? I want to try some thing, and I don't have a TC button.

SWITCH THE STUPID BLOODY TRACTION CONTROL OFF.

Ahem, and Leave it off. Then drive over your bump again.
I'll bet your bang sound goes away.

The most ridiculous DORK idea I have ever heard of. The vehicle was designed with 3, count them three, limited slip differentials. It has the Range Rover Posi-traction system. What under educated doofus decided it was a good idea, to fit a computer that keeps slamming the bloody brakes on, to a vehicle that NEEDS to be worked, to pull through the rough stuff.

Humour me please and just try it.



Shorty. The only way i can see to switch the TC off is by switching off the engine then engaging the CDL then stating. Is there another way to switch TC off.???????

[mark2]

I would suspect the shocks topping out - jack the rear end under the x-member or tow bar and see how high you can lift it before a wheel starts to lift. This happened to me with heavier rear springs fitted and standard shocks.

[shorty943]

Forgive me, the newest any thing, I have ever had is my 79 model S3.

Traction Control can't be turned off? And what, please explain, is CDL?

S'okay, just worked it out. Central Diff Lock. Right?

Oh my, your poor little truck. And it's an Auto. The poor bloody thing has every thing going against itself full time. Especially, that public servant, of a Traction Control system. For ever slamming the brakes on, because it thinks you have lost control.

Next week good old "some boffin", will tell a journalist that man kind is too important and fragile to be allowed to actually operate the vehicle themselves, and must employ a "trained technician" to chauffer them.
And then good old Harold Scroobie will rant about our unsafe behemoth people killers. And demand the computer take full control of the vehicle, for "pedestrian safety" of course.

What ever happened to actually driving the vehicle ourselves. What ever happened, to the concept of the driver, actually being in control of the vehicle.

Any how, back to this bang. Some how, I think it is related to the TC set up.
If any wheel breaks traction in any way, it will speed up in relation to the rest. The computer will slam on the brakes. And if the wheel is in the air, it will stop with a bang. Then start again with a bang as power comes back on.

Try not going over bumps?:angel:

Sorry Will. I am the definitive Luddite.
The only help posts, for the older models? Where can I obtain an old some thing, and not very many of those.
For the new models, it is always the "computer" and "TC". And every model.
Sell the modern head ache and buy a "real" Land Rover.
And no, I don't want to buy a newer Landy.
And double no, I will Not be selling my S3.
No traction control, no ABS, no ECU, no buttons to push at all. A total drivers joy. And if it goes bang?
Don't worry, what ever it was, the Landy has "brushed" it out of the way.


Shorty.

[LandyAndy]

Shorty
Despite the SHORT comings of the D2/Defender Extreme traction control it is GOOD.
If you are ever in WA or Im in SA you are welcome to a drive in any maner of terraian.
Im sure any closer member will do the same,trick is realise the systems short comings and take it in your stride.
Ive driven up steep sand tracks where others have chewed it with hard tyres no TC.Ive only left tyre tread marks,it really surprised me on my trip down!!!!!
Andrew

[Redback]

Have you checked the Watts link, i've just replaced mine because of the clunk in the rear.

Other than that shock topping or bottoming out, if you run the standard Billies and not the long travel ones.

Baz.

[willvine]

Just an update on the bang noise. upon closer inspection tonight as i finally have got a chance to play outside after the rain, I found the possible culpret... the ball joint for the ace actuator had poped out from its socket. on first inspetion it looked ok but a closer look reveled the ball joint had let go. I am guessing the ball joint poped out when I had the rear wheels off the ground and all shocks and the watts link removed but forgot to disconect the roll bars for the ace therefore the weight of the wheels with some gentile perswasion must have done it. Now. My question is. I removed the ball joint and pushed it back in place then reinstalled, a day later it had poped out again ( only street driving) so since I have fitted 20mm coil spacers and poly airs has the increase in height put too much stress on the ball joint and can the ace be adjusted to cope with the extra height???

any help would be great as big trip 3 weeks away. hence the suspension upgrade. and now poor. might have to push the disco back from the rock.

thanks in advance.

[cal415]

I have ACE and SLS with 50mm spacers, i have adjusted the SLS sensors to have the rear sit about 65-70mm above standard height, i havnt had any problems with it puting stress on my ACE setup. Chances are pull the ball joint out damaged it, replace it and see how it goes.

Also you might wanna check your ACE chassis mount bushes, seems to be a pretty comon thing to give up in a d2, mine have a bit of play in them and cause a slight knock sound every now and then, not as bad as my failed watts link caused. If you get under and give the watts link a good shake you will definetly see if the bushes are flogged out in it.

[cal415]

oh and as for the TC causing a clunk, you probobly wouldnt be able to hear it over the ABS grinding noise ;)

i can see these thread turning in to a discussion about the merits of D2 ETC.