Noise from left rear wheel

[rs6er]

Since I recently bled my brakes, I have been hearing a rotation rubbing noise from the left rear wheel of my 2001 Suburban 1500. Yesterday I pulled the caliper and looked inside of the rear rotor/drum because I couldn't see anything obvious.

I could see a shiny spot on the inside of the rotor and on the parking brake shoe. It seemed that that the rotor was hitting the shoe at a point in its rotation. I fiddled with the shoe to make it more axle-centric. I also made sure that the rotor backing plate which is only a year old was not hitting anything and checked that its tabs were bent in properly.

To test my work, I put the caliper back on the hub, and with the truck in neutral, rotated the hub. At one point in the rotation, I am getting a metallic ping. I can't figure out what this is by inspection. Any ideas?

Also, does anyone make an updated brake shoe that attaches in 2 rather than 1 place? This design is so lame.

[j cAT]

Originally Posted by rs6er

Since I recently bled my brakes, I have been hearing a rotation rubbing noise from the left rear wheel of my 2001 Suburban 1500. Yesterday I pulled the caliper and looked inside of the rear rotor/drum because I couldn't see anything obvious.

I could see a shiny spot on the inside of the rotor and on the parking brake shoe. It seemed that that the rotor was hitting the shoe at a point in its rotation. I fiddled with the shoe to make it more axle-centric. I also made sure that the rotor backing plate which is only a year old was not hitting anything and checked that its tabs were bent in properly.

To test my work, I put the caliper back on the hub, and with the truck in neutral, rotated the hub. At one point in the rotation, I am getting a metallic ping. I can't figure out what this is by inspection. Any ideas?

Also, does anyone make an updated brake shoe that attaches in 2 rather than 1 place? This design is so lame.

remove the brake pads/clips . lock down the rotor with 2 studs , and rotate the axle. the clips installed wrong bent not seated can make this noise..clips scrape on rotor..

the shoe is one piece, rotate to install. if the inner park brake drum is clean bright metal the park brake shoes are dragging ..make sure the shoe clip locks down those shoes..with the shoes flopping around you will get rapid park brake failure.

[rs6er]

Originally Posted by j cAT

remove the brake pads/clips . lock down the rotor with 2 studs , and rotate the axle. the clips installed wrong bent not seated can make this noise..clips scrape on rotor..

the shoe is one piece, rotate to install. if the inner park brake drum is clean bright metal the park brake shoes are dragging ..make sure the shoe clip locks down those shoes..with the shoes flopping around you will get rapid park brake failure.

The shoe clip doesn't prevent the shoes from going from side to side, even though it is tight. Also, this condition just developed when I was bleeding the brakes. I wasn't touching anything else.

[j cAT]

Originally Posted by rs6er

The shoe clip doesn't prevent the shoes from going from side to side, even though it is tight. Also, this condition just developed when I was bleeding the brakes. I wasn't touching anything else.

the park brake shoe clip prevents , the park brake shoes from flopping around............

Is the inner park brake drum bright metal ?

the caliper pads clips/retainer s/steel metal remove these to see if they are the cause of the noise !


you just bleed brakes and did not remove tire ? this is what I understand you did '" I just bleed brakes, didn't touch anything else ",,,

when the tire is removed the rotor can move around things get out of position.. this includes the park brake !

[rs6er]

Originally Posted by j cAT

the park brake shoe clip prevents , the park brake shoes from flopping around............

Is the inner park brake drum bright metal ?

the caliper pads clips/retainer s/steel metal remove these to see if they are the cause of the noise !


you just bleed brakes and did not remove tire ? this is what I understand you did '" I just bleed brakes, didn't touch anything else ",,,

when the tire is removed the rotor can move around things get out of position.. this includes the park brake !

The brake shoes have definitely been rubbing on the inside of the rotor, to the point where one side of the rotor drum is thinner than the rest.

No matter what I do, (adjusting the separation between the pad sections on top), I can not get the rubbing to stop. The clip is tight.

[j cAT]

Originally Posted by rs6er

The brake shoes have definitely been rubbing on the inside of the rotor, to the point where one side of the rotor drum is thinner than the rest.

No matter what I do, (adjusting the separation between the pad sections on top), I can not get the rubbing to stop. The clip is tight.

they made new clips. these have 2 points that hold these park brake shoes more securely to the backing plate.these shoes should not slide on the backing plate easy.

replace these clips..park brakes dragging is not good..


set and release park brake,,, vehicle in neutral,,, front wheels blocked. rotate the axle. see if the park brake is hitting. the dog ear on the back where cable connects should be about 1/4 of the full amount when park brake is applied ,,adjusting these shoes takes some time.

if necessary remove the shoe to see if this is the noise !

still think it is the pad clips on caliper !

paint the inside of this park brake rotor drum then repeat the test see if the shoes are wearing the paint surface .. readjust shoes ..

[rs6er]

Originally Posted by j cAT

they made new clips. these have 2 points that hold these park brake shoes more securely to the backing plate.these shoes should not slide on the backing plate easy.

replace these clips..park brakes dragging is not good..


set and release park brake,,, vehicle in neutral,,, front wheels blocked. rotate the axle. see if the park brake is hitting. the dog ear on the back where cable connects should be about 1/4 of the full amount when park brake is applied ,,adjusting these shoes takes some time.

if necessary remove the shoe to see if this is the noise !

still think it is the pad clips on caliper !

paint the inside of this park brake rotor drum then repeat the test see if the shoes are wearing the paint surface .. readjust shoes ..

All good advice, but I fail to see where the pad clips can come in contact with the caliper. Also, not sure what you mean by:"dog ear on the back where cable connects should be about 1/4 of the full amount when park brake is applied." I've never been able to figure out how to adjust the brakes from the other side of the backing plate. If you could point me to any pictures tht might help.

[j cAT]

Originally Posted by rs6er

All good advice, but I fail to see where the pad clips can come in contact with the caliper. Also, not sure what you mean by:"dog ear on the back where cable connects should be about 1/4 of the full amount when park brake is applied." I've never been able to figure out how to adjust the brakes from the other side of the backing plate. If you could point me to any pictures tht might help.

you may not understand this caliper pad clip hitting the rotor...

the reason I stated this is because I have had this occur. especially on these rust belt vehicles..


the park brake cable connection to the dog ear with the park brake applied should be 1/4 of the full throw amount..

when you adjust the small inner drum wheel to expand the park brake shoes set the rotor back in place held securely by the bolts, this dog ear should be in this position for the park brake to hold when applied.


YOU DO NOT ADJUST THE DOG EAR !
the dog ear is a reference point to indicate how well the shoes are adjusted or when first looking at the dog ear with no removal to indicate if the shoes are worn down, because now the parking brake is not working.

the other scraping noise could be from rusted rotor edges need filing down, backing plate on the rotor , the wheel bearing may be making some noise. the bearing noise is hard to say what sounds it may make .

normal sound would be a moaning noise, then most all times the seal leaks , diff oil on the park brake shoes .


with a wire brush remove all rust on you axle /rotor /caliper /backing plate ..then re-install and adjust ..

[rs6er]

Originally Posted by j cAT

you may not understand this caliper pad clip hitting the rotor...

the reason I stated this is because I have had this occur. especially on these rust belt vehicles..


the park brake cable connection to the dog ear with the park brake applied should be 1/4 of the full throw amount..

when you adjust the small inner drum wheel to expand the park brake shoes set the rotor back in place held securely by the bolts, this dog ear should be in this position for the park brake to hold when applied.


YOU DO NOT ADJUST THE DOG EAR !
the dog ear is a reference point to indicate how well the shoes are adjusted or when first looking at the dog ear with no removal to indicate if the shoes are worn down, because now the parking brake is not working.

the other scraping noise could be from rusted rotor edges need filing down, backing plate on the rotor , the wheel bearing may be making some noise. the bearing noise is hard to say what sounds it may make .

normal sound would be a moaning noise, then most all times the seal leaks , diff oil on the park brake shoes .


with a wire brush remove all rust on you axle /rotor /caliper /backing plate ..then re-install and adjust ..

I removed all rust from the caliper and checked to make sure there is no contact with the backing plate. The wheel bearing is not making any noise, and the seal is new.

I am not concerned about the parking brakes working at all. They have barely, if ever, worked since new.

I tried rotating the little spline wheel so that the circumfrance of the parking brake shoe is smaller, but that just allows the shoe to move, so I expanded it again. I can't figure out why the shoes are still rubbing on the drum.