Update on rear brake/axle sound .. whine sound ...

[marin8703]

hey rangerross, sorry to go off topic but what do you mean by two different vehicles? bad dofferent or good different? in what way? im just curious cauze i dont really know how the h2 is. Thanks

[ChevyHighPerformance]

Not sure if this is it. But, the H3 has dynamic proportioning for the rear brakes. The pressure is modulated to the rear brakes to provide more even braking between the front and rear brakes. Could you be hearing/feeling the pulsations from the rear brake pressure being modulated?

[Hmmm2]

It's not a 'pulsating' feeling at all. Here's the scenario ... you're driving along, maybe about 40mph. You see the light change a block up. You start slowing, then have to come to a harder stop ..not an immediate 'slam on the brake', but a quick hard stop. Jusssssst seconds before you immediately stop, there is this grind you can feel for 5 seconds before you are stopped. It sounds like it's coming from the rear right. I THINK I can feel it in the brake pedal, too, but that could be only because I hear it, too. The driver definitely 'hears' and senses it more than the passengers ... but the passengers can hear it, too. It's quick ... just before the H stops moving. What bothers me, too, is that I don't offroad MINE. It's strictly a street driver. Yet, while in Las Vegas at "The Drive" ... the 2's and 3's, which go through the rigors of their offroad obstacle course time after time, day after day .. do NOT have this sound. AGH! I hate when someone at a dealer (Service Dept!!!!) tries to tell me with a straight face, "Oh, that noise? It's just a noise all H3's make." Same person who tired to tell me all H3's have drum brakes. "Nuff said. Thanks to all who scratching their heads here and trying to figure this out for me.

[HummBebe]

You know, mine does the same thing, exactly as you describe it above. The last few seconds before the truck comes to a complete stop. The best you can do is make sure it is noted as a complaint in the system.

Then, if somehow down the road something does malfunction, you may be able to still get it done under warranty?

[StarsnBars]

Mine doesnt make that sound at all and Ive hit the brakes hard abunch of times. Question,,, Can the ABS need adjusted? I dont know much about ABS stuff and maybe a GM guy in here can help answer this question. Just a though, I know its not much, just tryin to help.. Good luck, keep us posted..

[signals34]

check to see if the noise-whine-grind-sounds the same, or disappears, on pavement and then on dirt-trail......

[marin8703]

tryed on mine to see if i get anything.
Tryed several times, actually went into a skid on one and the abs kicked in.

Other than the pulsation of the ABS i didnt feel or hear anything else.

[OU812]

... you're driving along, maybe about 40mph. You see the light change a block up. You start slowing, then have to come to a harder stop ..not an immediate 'slam on the brake', but a quick hard stop. Jusssssst seconds before you immediately stop, there is this grind you can feel for 5 seconds before you are stopped. It sounds like it's coming from the rear right.

Rick and others was there ever any resolution to your rear brake grind, or are you just living with it?

[fourfourto]

It seems Rick hasn't been here since 11/06 ?
As for me it still makes noise
I found when I tied off the parking brake spring /lever the noise stopped so its not the suspention? I found a little brake lube on the pads will temporary stop the noise.
Im at 43K now at 49K Im going to bring it to the dealer and see if they came up with a fix by now?


I saved this F5put it up on the X forum some time ago,maybee I can talk the dealer into a brake job before warranty expires.


Subject: Brakes Grunt, Groan, Grinding Noise from Rear When Vehicle Comes to a Stop (Refinish Rear Rotors) #07-05-23-004 - (09/26/2007)
Models: 2006-2008 HUMMER H3

Condition
Some customers may comment on a grunt, groan or grinding noise coming from the rear of the vehicle when coming to a stop.

Cause
Rotor corrosion generates a slip-stick condition transferring vibration through the suspension.

REPLACE THE ROTORS ONLY IF THE ROTOR THICKNESS IS BELOW THE MINIMUM THICKNESS SPEC AFTER REFINISH.

Refinish the rear rotors by removing 0.4 mm from both rear rotor surfaces.

Do not replace the brake pads unless the condition requires it (i.e. excessively worn, damaged, or contaminated).

If the noise persists, a brake dampening compound may be applied to the back of each pad. This allows parts to slide freely and not vibrate when moving relative to each other.

[Big Dad]

Mine started grinding today. It's the rears.

[RubHer Yellow Ducky]

noise still there...34000 miles

[Big Dad]

Just got back from a hundred mile round trip. Noise went away.