Rear brake rattle

[Tugela]

I was due for new rear brakes on my Disco 1 so I installed Defender calipers and pads to get the beefier pad retaining hardware - stouter solid pins that go through the pad brackets as shown in this photo:

As opposed to the D1 pad hardware that consists of split pins and leaf springs:

Since making the switch, I have noticed a loud, jangling rattle coming from the rear of the vehicle when going over bumps or rough terrain. When I apply the brake, the rattle stops. I've tried driving over rough surfaces with one foot on the throttle and the other applying the brake and the rattle stops. Before I jack the axle up and remove the wheel to investigate further, has anyone else experienced this issue? I'm guessing the pads are rattling around on the retaining pins. I never noticed this on my TD5 D110. If it's a known issue, has anyone had any luck eliminating the rattle with some kind of modification? I'm reluctant to mess with the setup since (a) brakes get hot, and (b) I don't want anything getting stuck between the pad/rotor, pad/caliper, etc.

 

[Mirrajumper]

The chamfered edge of the pad is installed in the downward position……. Check for that and report back. Cheers

 

[Tugela]

The chamfered edge of the pad is installed in the downward position……. Check for that and report back. Cheers

Rear pads are oriented with the bevel pointing down (i.e. the bevel is the leading edge of the pad as the rotor spins during forward travel.

Here's what I suspect: the holes through which the retaining pins pass are larger than the pins, allowing the pads to shake up and down when going over bumps. Since a picture tells a thousand words:

 

[erover82]

L

Rear pads are oriented with the bevel pointing down (i.e. the bevel is the leading edge of the pad as the rotor spins during forward travel.

Here's what I suspect: the holes through which the retaining pins pass are larger than the pins, allowing the pads to shake up and down when going over bumps. Since a picture tells a thousand words:

View attachment 28119

Push some epoxy putty in the pin slots and see if it stops.

 

[Mirrajumper]

You can also try a super thin layer of antiseize on that backing plate. Did you bleed the brakes after installing pads? Getting the air out will allow better piston contact to back of pad..:::

 

[Tugela]

You can also try a super thin layer of antiseize on that backing plate. Did you bleed the brakes after installing pads? Getting the air out will allow better piston contact to back of pad..:::

I've bled the brakes twice in the last couple months. So far the epoxy idea sounds like the leading candidate.

 

[Mirrajumper]

How did it turn out, noise gone?