12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

Warped rear drums

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Old Aug 5, 2011 | 09:52 PM
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racin_ny's Avatar
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Default Warped rear drums

I have a 98 12 valve 8800 gvw 4x4. In the last year I have gone through two sets of the $55.99 Advance Auto rear drums. I'm tearing into it tomorrow and I was wondering if anyone had any idea of what's going on. When the first set warped I adjusted the rear proportioning valve to give less breaking in the rear. I made sure they weren't adjusted up too tight and the e brake cables seem good. I use the ebrake every time I park. The pads were changed a year ago they came from Carquest. Can anyone recommend a brake shoe / drum combination that works well for them? I do not do any hauling or towing. Thanks for the help in advance.
 

Last edited by racin_ny; Aug 5, 2011 at 09:53 PM. Reason: Brain fade!
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Old Aug 6, 2011 | 10:42 AM
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South Tx Coal Roller's Avatar
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What condition are your front brakes in?
 
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Old Aug 6, 2011 | 03:32 PM
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Pretty good they were new about 8 months ago new calipers, pads disc's and flex lines.
 
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Old Aug 7, 2011 | 08:32 PM
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Pulled the rear brakes all apart. Turned 1 drum in on warranty because it was warped. Changed both rear wheel cylinders and springs and hold downs. Shoes look good, made sure the adjusters were free. I guess we'll see what happens.
 
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Old Aug 14, 2011 | 10:58 AM
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ok my experience on this and things i have heard are that using the parking brake while the brakes and drums are still hot will cause warping. I had warped drums before and since i stopped using the parking brake i havent had them warp since. I am going to guess that using top quality pads and drums might also eliminate the problem.
 
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Old Aug 14, 2011 | 08:37 PM
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tiremann9669's Avatar
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I think Advance Auto is your problem, try some NAPA or Carquest drums
 
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