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Jul 21st, 2025 | | | | Joined: Jun 2014 Posts: 152 'Bolter | | 'Bolter Joined: Jun 2014 Posts: 152 | Hi guys,
Recently and increasingly my rear wheels lock up everyone I brake resulting in a loud tyre screach even when gently braking (which is hard to do now). The rear brakes seam to be grabbing. It's very hard to brake without locking up the reads
Anyone have any ideas what it maybe ?
I have a front disc conversion. Brakes have been fine for a few years before this
The passengers side rear feels like it's locking more (brakes pull to right and tyre screach more evident on right)
Last edited by Drmike; 07/12/2017 11:16 PM.
| | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Lines clogged by swelling rubber lines, replace longs?
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Feb 2004 Posts: 28,674 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 28,674 | Check for a grease seal leak on the right rear- - - -even a little bit of oil on the brake linings will cause a brake to grab and lock up the wheel.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Jan 2001 Posts: 5,320 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,320 | If you find oil on the shoes, check the diff vent. Very common for these to plug up and put pressure on the seals.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Dec 2006 Posts: 206 Shop Shark | | Shop Shark Joined: Dec 2006 Posts: 206 | dirt, grime and oil on the linings comes to mind first, then a faulty prop valve | | | | | Joined: Jun 2014 Posts: 152 'Bolter | | 'Bolter Joined: Jun 2014 Posts: 152 | thanks guys for your advice. ill pull off the drums and see whats happening.
rubber hose does look quite old.
cheers
mike | | | | | Joined: May 2007 Posts: 1,715 Moderator: 60-66 Trucks; North Eastern Bolters | | Moderator: 60-66 Trucks; North Eastern Bolters Joined: May 2007 Posts: 1,715 | New learning on the seals and grease on linings. Thanks for insight. | | | | | Joined: Jun 2014 Posts: 152 'Bolter | | 'Bolter Joined: Jun 2014 Posts: 152 | Just want to thank you guys and let you know you were 100 percent spot on with your advice!
I cleaned up the oil and brakes worked again. I have a slow leak so will need to change the seal at some point
Cheers
Mike | | |
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