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06-15-2021, 09:30 PM
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#1 |
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Where's my beer?
Join Date: Oct 2004
Location: Glen Allen, VA
Posts: 1,768
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Right rear locking up
I just replaced a leaky wheel cylinder on that wheel and its locking up way earlier than the others. I checked the adjustment and theres no drag at all on the drum, which normally i would think it should be adjusted tighter because theres no drag. If theres still air in the line wouldnt that make a mushy pedal? Its not mushy at all. Any ideas or suggestions?
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70 C10, shortstep, .30 over 250,Hurst shifted 3 spd parts hauler. Holley 390, Clifford Intake, Header, ported cylinder head, unknown bigger cam. 79 Corvette L82, 4 spd, black, red interior, headers, flowmasters, and unkown bigger cam. '03 Grand Cherokee Laredo, 4.0 4x4 daily driver. 165K miles, and runs great '08 Tahoe LTZ 4x4 155K |
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06-15-2021, 10:02 PM
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#2 |
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Registered User
Join Date: Jul 2018
Location: Catskill Mountains,NY
Posts: 8,124
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Re: Right rear locking up
Did you change the linings? Brake fluid soaked shoes will cause grabby brakes
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Mark 72 c20 custom camper Husky edition, 66 SS396 Chevelle 1964 Hawk, 63 Avanti,62 lark 1969 AMX , 1968 c20 stepside ,85 K20 1977 Suburban sold 68 anniversary. |
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06-15-2021, 10:10 PM
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#3 |
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Who Changed This?
 
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,076
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Re: Right rear locking up
What he said. You can salvage the linings by spraying brake cleaner on them, or Easy-Off, to dissolve the grease. We used to dip greasy shoes in the hot tank, which is lye, like Easy-Off, after replacing rear wheel bearings.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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06-16-2021, 06:35 PM
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#4 |
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Where's my beer?
Join Date: Oct 2004
Location: Glen Allen, VA
Posts: 1,768
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Re: Right rear locking up
I did spray the linings pretty good with brake clean, but based on what yall are saying, i may go back and replace the shoes.
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70 C10, shortstep, .30 over 250,Hurst shifted 3 spd parts hauler. Holley 390, Clifford Intake, Header, ported cylinder head, unknown bigger cam. 79 Corvette L82, 4 spd, black, red interior, headers, flowmasters, and unkown bigger cam. '03 Grand Cherokee Laredo, 4.0 4x4 daily driver. 165K miles, and runs great '08 Tahoe LTZ 4x4 155K |
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06-16-2021, 07:05 PM
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#5 |
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Shortbed club member
Join Date: Jan 2008
Location: Halethorpe, MD
Posts: 436
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Re: Right rear locking up
I've driven with my parking brake on for short periods to burn off the brake fluid in the shoes.
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71 custom/10 6.0/4L80E SWB ece 4/6 72 custom camper 350/3 spd 2020 Chevy Express 3500 2023 Hyundai Tuscon 1986 GMC 3500 Bucket Truck Sent from my Rotary Phone via 14.4kb/s modem. |
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06-17-2021, 12:47 PM
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#6 |
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laying low
Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 12,946
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Re: Right rear locking up
Gear oil leaking past the axle seal can run down onto the brake shoes and cause wheel lock up also.
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Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross |
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06-17-2021, 01:19 PM
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#7 |
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Registered User
Join Date: Oct 2005
Location: Northern Arkansas
Posts: 1,127
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Re: Right rear locking up
I don't know.....seems to be a GM thing. I've had SEVERAL through the years do it. Just bleed everything again.
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06-17-2021, 04:40 PM
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#8 |
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Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,190
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Re: Right rear locking up
You need to replace the shoes. You cannot get the fluid or grease out of the linings. It may work for a while but the heat is going to bring it out again. I've sanded them down with sandpaper & again it didn't last.
George |
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06-17-2021, 05:22 PM
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#9 |
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Registered User
Join Date: Jul 2018
Location: Catskill Mountains,NY
Posts: 8,124
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Re: Right rear locking up
I never try to clean brake shoes. For the money it’s not worth it
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Mark 72 c20 custom camper Husky edition, 66 SS396 Chevelle 1964 Hawk, 63 Avanti,62 lark 1969 AMX , 1968 c20 stepside ,85 K20 1977 Suburban sold 68 anniversary. |
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06-18-2021, 06:32 AM
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#10 |
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Registered User
Join Date: Nov 2001
Location: Old Bridge,NJ
Posts: 814
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Re: Right rear locking up
I had that problem once ( brake locking up in the rear on one side) it turn out to be the brake shoes were reversed when replaced, oops.
NGN Nick |
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06-18-2021, 09:50 PM
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#11 |
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Senior Member
 Join Date: Aug 2019
Location: Cheraw
Posts: 1,305
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Re: Right rear locking up
I don't understand why anyone would try and reuse brake shoes that have had brake fluid on them. There cheep! Would you really risk wreaking your truck over $25.00 for brake shoes.
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06-18-2021, 10:08 PM
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#12 |
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Registered User
Join Date: May 2016
Location: Henderson NC
Posts: 975
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Re: Right rear locking up
I bought a C10 once and the left rear kept locking up. Turns out the previous owner had installed a right hand adjuster on the left side.
I know this probably isn't your problem but I thought I would put it here in case someone else has brakes locking up. |
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06-19-2021, 08:10 AM
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#13 |
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Registered User
Join Date: Sep 2005
Location: Smith Mountain Lake Virginia
Posts: 1,537
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Re: Right rear locking up
There's always the collapsed line too... But usually that means it won't release at all. Again for anyone else reading along.
__________________
"A cat will almost always blink when hit between the eyes with a ball peen hammer" (you don't always have to state the obvious) Wear your PPE! You can eat with false teeth but you can't see with a false eye. 1959 Studebaker Silverhawk 350/400 1972 C10 L6 3OTT 2005 F350 - Built - whew! |
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06-19-2021, 01:28 PM
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#14 |
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Registered User
Join Date: Jul 2013
Location: Mount Albert.Ontario
Posts: 119
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Re: Right rear locking up
I have seen rear brakes lock from not being adjusted enough. I think the shoe comes out at high presure or something.
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