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11-15-2007, 08:45 PM
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#1 |
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Senior Member
 
Join Date: Apr 2001
Location: Alexandria, MN
Posts: 1,462
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New C20 brakes pulsing???WTF???
Ive replaced my disk/drum brakes on my 72 c20 and now my brakes are pulsing quite a bit more than I'd like... The truck did not puls before the repair, but the rear drums and shoes were HEAVILY grooved, and the inside front pads on both sides were down to the rivets... I installed new shoes (in the right locations) and had the drums turned in the rear and had the rotors turned and new pads in the front... brakes had new fluid in them from this summer and is up to the appropriate level and all wheel cylinders had been replaced this summer as well. AFAIK I made sure everyting was free and lubed in the front calipers (removed and polished all caliper pins and bushings) and the rear drums were adjusted out to provide just a hint of drag. Did I miss something obvious???
--Mike
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63 C20 2WD, 230/SM420/4.11 73K 68 C30 dump truck, 327,SM425,4.56 66K original 68 C10 2WD SWB Stepper, 250/3-tree/3.73 66K.... Wifes 68 Buick Skylark Custom Conv., 350/TH400/2.56 In our family since '79 69 GMC 1500 SWB 2WD, 350/TH350/3.73 posi... 70 K10 SWB 4X4 4-sp,ps, pb, tilt, buckets, console, sliding back window (Need AC parts) WIP 72 Chevy K20 4x4 350/350/205/4.56 donor 72 Vette 350/M21/3.70 posi, triple black and super fast 84 Olds Cutlass Brougham 350/2004r/4.11 was Dad's |
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11-15-2007, 10:56 PM
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#2 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,852
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Re: New C20 brakes pulsing???WTF???
Sounds like there`s still a problem with the rotors or drums.The only other thing I can think of is a bad wheel bearing.But,you would have noticed that,Right?
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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11-15-2007, 11:03 PM
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#3 |
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Registered User
Join Date: Nov 2000
Location: Carver County, Minnesota, USA
Posts: 626
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Re: New C20 brakes pulsing???WTF???
My experience has been warped rotors. Maybe the rotors are yet warped and/or the drums are out of round yet.
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72 Chev C-10 90% restored (former AZ truck) ... 71 Chev K-20 Cheyenne my vacation crusier... 72 Chev C-10 Now retired and striped after many faithful miles... 72 GMC 1500 Retired to the junk yard after bought new in '71... |
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