Thread: Noise from abs modulator...?

Originally Posted by benji

Just had my brother over with his 99model. After a bit of a drive we could hear a very faint noise from the motor side of the abs modulator. The keys were out of the ignition.

Has anyone else noticed this?

Also, would anyone know if a weak shuttle valve would cause the traction control to be weaker than it should? My cousin basically has the same problem on his 02defender. When the axles are crossed up in mud the tc isn't strong enough to break traction on the other wheels.

The TC in mud / water is less effective as the brakes are effectively wet.

A softer pad (more dust and faster wear) or a slotted rotor (helps clear the pad to disc surface quicker) will assist.

The ticking is normal, and stops after a while.

The other thing to bear in mind that it is Traction Control. You will always be limited by the amount of traction available.

In the situation described - cross axled in mud, the limiting factor will the amount of grip available to the wheels touching the ground. The ETC will apply braking to the wheel in the air up to the point the wheel on the ground starts to loose traction and will then back off the braking to ensure that power is transferred to the limit of the available traction.

What you shouldn't ever see is the ETC braking a wheel to the point that the opposite wheel spins.

cheers
Paul