Why Drums??

Discussion in 'Lifted & Offroad Suspension' started by smccollamjr, Jan 6, 2010.

  1. smccollamjr

    smccollamjr New Member

    My dad has an '04 Extended Cab Z71 and has rear disk brakes. My '06 CC Z71 has drums. Does anybody know why GM went from disks to drums?
  2. Jimmiee

    Jimmiee Epic Member 5+ Years 1000 Posts

    A quick reply............$ :)$
  3. BillNH

    BillNH New Member

    I was told they went to them due to the corrosion issues on the disks. I Changed my rear brakes more often than my front with my 01. Thats not right. Your front do 70-80% of your braking.
  4. silveradotrailblazer

    silveradotrailblazer Epic Member 5+ Years ROTM Winner 5000 Posts

    My 05 Z-71 crewcab also has rear drums. I was tould that the 1500s with trailer package has drums????? Havent been able to confirm this.
  5. smccollamjr

    smccollamjr New Member

    Dad's '04 has the trailer package and disks, and it's a 1500. He did tell me the other day he needed rear brakes (60k miles) but his fronts were good.
  6. silveradotrailblazer

    silveradotrailblazer Epic Member 5+ Years ROTM Winner 5000 Posts

    Anyone else have any ideas???:confused:
  7. redneckarmyMP

    redneckarmyMP Epic Member 5+ Years 500 Posts

    i personally like the disk brakes better because im clueless when it comes to replacing drums..
  8. TritonBoulder47

    TritonBoulder47 Rockstar 4 Years 500 Posts

    Sound like the proportion valve on your trucks isn't functioning properly... I have 4-wheel discs on my Av and all 4 of mine get changed at the same time, and all 4 have just about the same amount of wear on them...
  9. DarkCherry

    DarkCherry Rockstar

    i was wondering this same thing. Bought a new 08 last year, Top of the line LTZ 4x4 Crew with the HD tow package and it came with read drum brakes. I was surprised to see this, I figured all newer trucks, especially the higher end ones came with disc brakes.

    I don't really care it stops on a dime. But my guess is that drum brakes are probably tied to the HD tow package like someone else explained. I am out on a limb here, but I think drum brakes stay cooler resulting in less fade, especially if you were pulling something pretty heavy.

    Yesterday I had around 2000lbs in the bed and I was able to stop almost as quick as normally without any extra weight in the back. I was also surprised that the bed actually handled that much weight very well, there was almost no sag in the rear, as opposed to my buddies F150 that we loaded a while back with about the same amount of weight and his fenders were almost rubbing his rear tires.
  10. Dimsdale

    Dimsdale New Member

    You might also consider that rear drums are much more effective as parking brakes, which may be part of the reason they are used with towing/trailering packages. The tiny drums inside the rear disks are worse than useless, particularly for a large load on a significant grade.

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