Thread: Suspension rebound - is this normal?

The 'shocks' are really a damper. Their job is to dampen out the spring oscillations.


Your bounce problem is the 'shocks' not being able to handle the spring action, possibly due to a poor match (with the spring) if they've done it since new.

They are the shocks recommended by Terra Firma for the setup.

The fronts are fine, but there is just too much bounce in the rear, particularly with all 7 seats full with the trailer on.
Considering going the HD version of the springs for maintaining height when loaded, but if I replace the Shocks I can't afford to do all 4 to keep them matched.

Not enough low speed rebound valving.

Common on some setups to give a plusher ride but not how I'd valve a damper.

The front end of the D2 is really easy to control with shocks but the back end isn't, and I think that's because they have such a significant overhang with a lot lot of weight at the rear and likewise behind the rear axle. In a nutshell, the D2 needs to have a very stiff shock on the rear to keep it controlled. I would recommend shock with valving similar to Bilstein 360/80 linear valving, and that will still be very comfy unladen and well controlled. This valving should also be similar to Nissan Patrol GQ/GU rear shocks, but the lengths are different between the D2 and the Patrol.

Originally Posted by rick130

Not enough low speed rebound valving.

Common on some setups to give a plusher ride but not how I'd valve a damper.

The bump valving relates more to comfort as it bring the harshness through to the body. You can increase the rebound rate and still have a comfortable ride because the reaction happens between/across the spring/shocks.

So in essence should I just be looking at a different shock for the rear, or consider moving to a king HD spring as well as the upgraded shock.

When traveling I have 2 kids in the boot seats and a 7x4 box trailer. Definately not as bouncy in the rear at 100.

As I am in Brisbane for another week before heading home, I would imagine it would be cheaper to sort out down here then in FNQ.

Compression damping also damps out oscillations. More low speed compression kills the compression side of the bounce and can be really is if your rebound is already as slow add it should be. But first how are your shock bushings?

RS, do you know the spring rate of the kings you have? I have a feeling they are highish.


What is the stock spring rate in the rear?