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12-11-2004, 03:31 PM
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#1 |
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Registered User
Join Date: Nov 2003
Location: kc
Posts: 229
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brake question
71 swb, front disc, rear drum. when i apply my brake alittle hard the rear tires lock up first, is this common with the drum, disc set up? all my pads are new and so is my master cylinder, other than the rear tire locking up first my brakes feel and work great. just wondering if a new proportionary valve will solve this? are should i just not tinker with.
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71 C10 SWB BLACK AND WHITE 350 CRATE TH350 ENJOY LIFE |
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12-11-2004, 05:14 PM
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#2 |
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user # 2756
 
Join Date: Jun 2001
Location: Chesapeake, Virginia
Posts: 4,612
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You might have the rears adjusted a little too tight. I can lock the rears up in both mine real easy.
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1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm 
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12-11-2004, 08:33 PM
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#3 |
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Registered User
Join Date: Jun 2003
Location: Linden, North Carolina
Posts: 617
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I ran my back brakes loosely adjusted just so they would come in real late. You might try and use top quality pads up front, it might help them grab more. These trucks are just too light in the back empty. you could also put an adjust prop valve instead of reg, that way when empty you can use little back brakes, then when towing dial some more in.
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64 Panel Rebuild Pics Clutch Replacement and Borg Warner T10 Trans Rebuild 64 Panel 1/2 Ton 350cubes/400hp BorgWarner t-10 3:73 Auburn Posi |
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12-11-2004, 09:58 PM
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#4 |
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67-72 parts collector,…
Join Date: Nov 2002
Location: Mid-MO
Posts: 22,701
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Could you have a rear "wheel cylinder" or "axle seal" leaking? That would cause fluid to get on the shoe. I would pull a drum and check for something leaking.
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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12-11-2004, 10:25 PM
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#5 |
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Franko72
Join Date: May 2004
Location: Cincinnati,Ohio
Posts: 471
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I agree with lolife99 about a wheel cylinder leaking inside on the brake components. That has happened to me a few times with the same symptoms you have.Another thing to try is to re adjust the rear brakes . Jack up the rear with both tires off of the ground. Spin the tires and adjust till they start to drag, then they are adjusted.
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 1972 C20 cheyenne Super 402 BB/400 turbo LWB A/C Tilt, Cruise Control, Saddle tanks, Tach My Home Page Better to burn out than it is to rust |
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