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Brake Drum - out of Balance

Old 10-05-2016, 04:43 PM
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Default Brake Drum - out of Balance

Did the brakes on the rear of my Yukon and after putting on brand new drums the truck has a distinctive harmonic issue at speeds over 60 mph.

I am anal about steering and balanced smooth driving and am sure it wasn't there prior to the new drums being added.

Any one else have this issue or have a good source for balanced drums.

Off the record these drums were purchased at #$%ZONE
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Old 10-05-2016, 04:55 PM
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Take them back and get a refund and go to NAPA and buy a better product.
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Old 10-05-2016, 05:03 PM
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Originally Posted by mikefloyd View Post
Take them back and get a refund and go to NAPA and buy a better product.
Napa was high on my list. Its been a while since I have replaced drums and the fact that the other vehicles I have owned over the past few years have had 4 wheel discs.

Never remember having this issue. Country of origin was clearly marked all over the packaging a cast into the drums
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Old 10-05-2016, 05:41 PM
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Originally Posted by magua View Post


Napa was high on my list. Its been a while since I have replaced drums and the fact that the other vehicles I have owned over the past few years have had 4 wheel discs.

Never remember having this issue. Country of origin was clearly marked all over the packaging a cast into the drums
Unfortunately most of them are made in PRC. Even the Delcos. I'd try another set from AZ. Nothing wrong with white box drums and rotors other than getting a bad one every now and then
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Old 10-05-2016, 05:46 PM
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Originally Posted by Dillard88 View Post
Unfortunately most of them are made in PRC. Even the Delcos. I'd try another set from AZ. Nothing wrong with white box drums and rotors other than getting a bad one every now and then
yeah it kinda surprised me being out of balance since the drums had welded weights in an attempt to get them balanced.
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Old 10-05-2016, 06:26 PM
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You lost me after DRUMS.
They still make drum rears ??!!?

Wow.
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Old 10-05-2016, 06:32 PM
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Originally Posted by myyellas2k View Post
You lost me after DRUMS.
They still make drum rears ??!!?

Wow.
Ha! It must be pre 2000 Yukon. Although the 1500 GM trucks went back to drums mid 2000s
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Old 10-05-2016, 06:47 PM
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Originally Posted by magua View Post
yeah it kinda surprised me being out of balance since the drums had welded weights in an attempt to get them balanced.
I've seen many drums with welded weights
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Old 10-05-2016, 07:03 PM
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Originally Posted by myyellas2k View Post
You lost me after DRUMS.
They still make drum rears ??!!?

Wow.
Hey my 2007 Forested has drums! Without a doubt THE worst braking car I've ever owned. Even cheap commuter cars have 4 wheels discs!
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Old 10-05-2016, 08:52 PM
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Originally Posted by myyellas2k View Post
You lost me after DRUMS.
They still make drum rears ??!!?

Wow.
My 07 Silverado has it
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Old 10-05-2016, 10:00 PM
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Originally Posted by magua View Post
Did the brakes on the rear of my Yukon and after putting on brand new drums the truck has a distinctive harmonic issue at speeds over 60 mph.

I am anal about steering and balanced smooth driving and am sure it wasn't there prior to the new drums being added.

Any one else have this issue or have a good source for balanced drums.

Off the record these drums were purchased at #$%ZONE

I experienced this very same issue with unbalanced brake drums bought at NAPA for my 1996 GMC 2500 Suburban. At approximately 55 MPH vibrations became unbearable. Returned drums and replaced with new, problem went away. Absolutley maddening for the few days it was occurring.

Defective drums looked fine but there was clearly some sort of balance issue that caused MAJOR vibration issues.
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Old 10-06-2016, 03:42 AM
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Originally Posted by Mpellet View Post
I experienced this very same issue with unbalanced brake drums bought at NAPA for my 1996 GMC 2500 Suburban. At approximately 55 MPH vibrations became unbearable. Returned drums and replaced with new, problem went away. Absolutley maddening for the few days it was occurring.

Defective drums looked fine but there was clearly some sort of balance issue that caused MAJOR vibration issues.
Yeah I am with you on this one. I know my truck and it was smooth as butter at least up to 80 mph and rarely get up to that speed as well. This all before I did the wheel cylinders/shoes/drums

Drove great around town. Hit highway speeds Monday morning and it felt as though I might be losing a wheel that wasn't double tightened. It was smooth a s silk prior to the work being done the day before.

It is pre 2000 coming in at 99'. Awesome vehicle still looks decent pulls my boat with ease and it even went round trip to Wyoming this past summer pulling a very heavy popup with all the necessities for a family of 4 for 2 weeks+ 2600 miles round trip.
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Old 10-06-2016, 04:41 AM
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Originally Posted by magua View Post
Yeah I am with you on this one. I know my truck and it was smooth as butter at least up to 80 mph and rarely get up to that speed as well. This all before I did the wheel cylinders/shoes/drums

Drove great around town. Hit highway speeds Monday morning and it felt as though I might be losing a wheel that wasn't double tightened. It was smooth a s silk prior to the work being done the day before.

It is pre 2000 coming in at 99'. Awesome vehicle still looks decent pulls my boat with ease and it even went round trip to Wyoming this past summer pulling a very heavy popup with all the necessities for a family of 4 for 2 weeks+ 2600 miles round trip.
Exactly same as with mine. Take those drums back ASAP......
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Old 10-06-2016, 05:10 AM
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Originally Posted by myyellas2k View Post
You lost me after DRUMS.
They still make drum rears ??!!?

Wow.

My 2011 Toyota has them
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Old 10-06-2016, 05:39 AM
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2006 Honda Civic also drums in rear.....
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Old 10-06-2016, 06:30 AM
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I have had that exact problem.. you really can't buy anything good anymore.
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Old 10-06-2016, 06:39 AM
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GM SUV's have a harmonic issue due to the bonding coming apart in the roof panels.Its a biggie.Some dealers will let you chase tire and wheel problems until the warranty expires.

http://www.trucktrend.com/news/1512-...fullsize-suvs/
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Old 10-06-2016, 07:09 AM
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Originally Posted by Jersus View Post
My 2011 Toyota has them
Tacoma?
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Old 10-06-2016, 07:14 AM
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Originally Posted by muskamoot View Post
GM SUV's have a harmonic issue due to the bonding coming apart in the roof panels.Its a biggie.Some dealers will let you chase tire and wheel problems until the warranty expires.

http://www.trucktrend.com/news/1512-...fullsize-suvs/
Apples to oranges.

This is not a GMC specific issue. It is a defective replacement brake drum issue. We are talking about older trucks equipped with drum brakes. Ride is smooth one day, service brakes, replace brake drums that unknowingly are defective and OUT OF BALLANCE = vibrations driving at speeds that yesterday rode smooth and today the truck suddenly vibrates like a wheel is falling off.

Remove out of balance drums, return to NAPA, Autozone ect, get new set, hopefully not defective, install , problem gone.......
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Old 10-06-2016, 07:41 AM
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I don't bother with any brake drums/rotors other than Bendix these days. Heaviest duty version offered. Tried several others, all junk. Source doesn't really matter. Napa seems to have the best "house brand" parts these days, but thy are barely a tick up from anything else. I've actually gotten most everything I've needed from Amazon lately, and also sometimes use Advance. Order online for in store pickup at advance, and you can get 10% off and not have to deal with the dumb kid behind the counter getting hung up on wethere you have a sunroof or not.
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