01 Durango brakes hanging up

[meangreen01]

Front driver brake making a sh-sh-sh-sh sound. It stops when brake pedal is pushed, but starts up again as soon as we're moving.

It was suggested by a buddy the rotor could be warped. I don't think so because I don't feel any pulsation through the pedal.

I think a pad may have busted a clip or something, causing the pad to sit cockeyed causing consant contact with the rotor?

Sound right? Any other ideas?

 

[artificialist]

On many of those trucks, a Phenolic piston might have been standard issue, and those tend to get stuck. If that happens, buy a new caliper, also new pads, rotors and a new hose. Stuck calipers will quickly destroy all that stuff due to excessive heat.

 

[The_Jeff]

Pads are supposed to have nearly constant contact, or at best a very slight gap to the rotor.

You might just have a resonant frequency going on. Whatever sort of anti rattle clips this truck uses might need tweaking. Or maybe you could put a small dab of something where the pad ears ride on the bracket. I'd say anti sieze but you don't want to attract dust.

Might be worth poking around in there. Maybe even taking it apart and reassembling might shake something around.

 

[meangreen01]

I should add that this is a fairly new caliper. It was the only one that the bleeder screw snapped off when I was bleeding brakes shortly after buying. So, it has about 12,000 mi on it. I reused the pads as they had a ton of fricton material left on them.

 

[meangreen01]

Originally Posted By: artificialist
On many of those trucks, a Phenolic piston might have been standard issue,


I'm not familiar with that caliper description, could you explain further? It looked like any ol' caliper to me.

 

[Chris142]

Originally Posted By: meangreen01
Originally Posted By: artificialist
On many of those trucks, a Phenolic piston might have been standard issue,


I'm not familiar with that caliper description, could you explain further? It looked like any ol' caliper to me.
Phenolic means a non metal piston. It looks like some sort of plastic material

 

[Steve S]

is the pad loose in the caliper?

 

[spasm3]

You are going to have to take it apart to see whats happening. I might rebleed that caliper. Sometimes you get a bad caliper new!

 

[meangreen01]

Thanks for the replies. I'm going to poke around in there this weekend. I have a set of pads already on standby.

 

[mechtech2]

Calipers need to be free and well lubed.
They don't move much, or very fast, but they do move. And they need to retract.

Check your backing plates for contact. Maybe a branch or debris is in there. Maybe a wheel sensor.

If you like the pads in there, apply some red anti squeal sauce on the backs [not gobby heavy].
See how she is after all this.

 

[morris]

+1 on the Phenolic piston. my dad had a 250 ram. it acted like the tires was out of balance. but it was the Phenolic piston.

 

[meangreen01]

UPDATE:

Pulled the wheel off to inspect. Quickly noticed a very clean streak on the back side of rotor. A piece of metal that I believe is some sort of splash shield VERY rusty, warped, and was making contact with the rotor.

I've seen these "shields" on my other vehicles as well. They are bolted to the knuckle. I just pried it away with a screwdriver and a good portion just broke away due to corrosion.

Now, after this inspection, and the general(rusty) condition of the rotors, I'm going to replace the rotors and pads anyway(Already have the pads). Question is do I really need that splash shield? Does it have a meaningful purpose? If so, Id imagine that I'll have to get that at the dealer.