Thread: D2 Suspension catching

my 5" coils read 150mm or less , is there a difference between d 2 and d 1 in size ?

Originally Posted by Mikey

Hi, I just measured the diameter of my springs to be about 148mm. My springs are standard units on my 1999 SLS Disco td5.

I checked the Ironman springs and they also measure about 148mm.
What I did notice is that my springs seems a lot more hefty the the ones on Slunnie's. More coils but this also means a softer spring.
The spring could thus flex side ways more easilly and catck the chassis rail. Will have to jack the D2 and see what happens.

Notes:
Checked with agent for specs.
Fronts are 117 ID and 15 dia - 147mm OD.

But on the other hand, what does catching and rubbing mean?

My catching is a "clunk, clunk" type noise.
Had to ask my son for the text version of the sound!
On a visual comparison, was mine a catch or rub?

Originally Posted by Rudolf

The front springs on my D2 catches on the chassis just above the bump stops.
This only happens on max cross axle and make quite some noise.
The springs are Ironman 2" lift kit.
Is this normal and any solutions available?

Yep ... there are answers ... but it involves looking at everything when it is under full flex ..

Could be just a case of lowering the stop bump rubbers so that you restrict how far the wheel moves up travel into the wheel arch ... The stabiliser bar at the front of the diff ... the centering / position of the bottom coil plate on your diff






I was trawling through "images" and tripped over this little inspiration ...




Sorry for the off topic photo .... but it demonstrates that 1 mod can equal another required mod to make it all work

So basically ... check all the sway bar at the front of the diff for it's condition / under normal conditions / then under full sway .... Then check the rest of it ....

Mike

Did my tests today.
Could not lift the D2 high enough but gave me the reason for the catching.
The spring bends and goes against the chassis rail. There were no places that I clould see something being faulty and/or worn.


Have a look at my first thread photos.
The third last coil rubs against the chassis rail and the second last coil catches on the bump stop mount.
Adifferent spring design could solve this. Look at the last coils on Slunnie's D2 spring. They are not wound tightly together.
This may be where the problem lies.
Will try andf get anather brand springs to see if it works better.

Originally Posted by Rudolf

The spring bends and goes against the chassis rail.

Another thing to check is the shocky .... If it has "bottomed out" before the diff hits the bump stop .. then it might be pushing / levering, the spring to one side

On the compressed side ... Take the top nut off ..... do the test ... and see if you can push the shock down // to see how much travel is left // bottomed out

Mike

Originally Posted by Rudolf

Adifferent spring design could solve this. Look at the last coils on Slunnie's D2 spring. They are not wound tightly together.
This may be where the problem lies.

In my pic the car is crossed up on a set of steps and there isn't much weight on that wheel. The spring doesn't normally sit like that.

Well, I have the same problem with a diferent coils. Perhaps there is not enough space to allocate the bending on compression, or simply DII loves thinner coils ?