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03-11-2015, 09:01 PM | #1 |
Post Whore
Join Date: Aug 2014
Location: Sacramento, CA
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Tires Squel When I Brake - Why?
Got three dirt old Copper Trendsetters SE 235/75 R15 tires on my '74 1/2 ton GMC 350 manual and one brand new one of the same kind in the rear.
When I brake and it can be at very low speeds (10 to 15 MPH) or even slower as I come to a stop sign or stop light the tires squel it sounds as if I am peeling out. I am gentle on the brakes as gentle as I can be. Any idea what this could be? Old tires? Brakes locking up since they are not anti-lock? Driver not knowing how to brake properly? Etc. |
03-11-2015, 09:35 PM | #2 |
Registered User
Join Date: Aug 2005
Location: Louisiana
Posts: 711
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Re: Tires Squel When I Brake - Why?
Is it actually a squeal from tire rubber skidding on the pavement? or is it a brake squeal?
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03-11-2015, 10:04 PM | #3 |
yeller
Join Date: Oct 2001
Location: Twin Cities
Posts: 13,826
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Re: Tires Squel When I Brake - Why?
Sounds like a wheel is locking up. Check your wheel cylinder to see if it is leaking fluid on the shoes...this will cause that wheel to lock up extremely easy with minimal pedal pressure.
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03-11-2015, 10:37 PM | #4 |
Post Whore
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Re: Tires Squel When I Brake - Why?
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03-11-2015, 10:39 PM | #5 |
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Re: Tires Squel When I Brake - Why?
Thanks Jeff, it sounds like its coming from the front wheels, and I got disc brakes in the front, would that still be the case with a leaky cylinder in the front?
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03-11-2015, 10:55 PM | #6 |
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Join Date: Dec 2013
Location: Humble, Texas
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Re: Tires Squel When I Brake - Why?
Sounds like the rotors are glazed causing a brake squeal. Rule of thumb is if they squeal all the time and it goes away when you brake, it the brake wear indicators. If it only squeals when braking, it is the pads or rotors are glazed. Have you had someone watch as you do it to see if the tire is actually sliding? Have you noticed any pulsation or rocking sensation while braking?
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03-12-2015, 08:08 AM | #7 |
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Join Date: Aug 2012
Location: Oklahoma City, OK
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Re: Tires Squel When I Brake - Why?
Had a set of tires years ago that did that. They would squeal like a panic stop even during normal braking. Was really bad on asphalt. Don't remember the brand. When I replaced the tires, noise went away.
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03-12-2015, 01:04 PM | #8 |
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Re: Tires Squel When I Brake - Why?
My thoughts exactly, thank you DP, now the dilemma is do I move the new 235/75R15 tire from the rear to the front and buy a matching new one for the other side. Or do I punt on the child's play 235s and take this opportunity to put some 275/60s meat on the bone? By the way we are running 8" rims.
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03-12-2015, 05:58 PM | #9 | |
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Re: Tires Squel When I Brake - Why?
Quote:
The plan is to switch wheels tonight and see if the problem follows that wheel (old tire) or if it stays with the drum brake. Again I only have one new tire on the back driver side. I plan on replacing the wheel cylinder or both rears tonight depending on my findings. I also ordered another matching new tire so that both rears will be new. |
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03-13-2015, 10:29 PM | #10 | |
yeller
Join Date: Oct 2001
Location: Twin Cities
Posts: 13,826
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Re: Tires Squel When I Brake - Why?
Quote:
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03-14-2015, 01:33 AM | #11 |
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Re: Tires Squel When I Brake - Why?
After I switched the rear wheels: left <=> right the problem stayed on the passenger side with the drum brake
so it was time to buy new wheel cylinders, I bought two since they were only $9 bucks each, and replaced both sides with new cylinders installed and brakes bleed = Problem Solved You can see the rest of the progress on my build thread Restoring Rusty |
03-16-2015, 11:57 PM | #12 |
yeller
Join Date: Oct 2001
Location: Twin Cities
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Re: Tires Squel When I Brake - Why?
Rock on, thanks for the update!
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03-23-2015, 10:20 PM | #13 |
Post Whore
Join Date: Aug 2014
Location: Sacramento, CA
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Re: Tires Squel When I Brake - Why?
I would like to withdraw that statement as I may have celebrated too early. So I still have the same problem. So back to the drawing board
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03-23-2015, 10:44 PM | #14 |
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Location: Humble, Texas
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Re: Tires Squel When I Brake - Why?
Did you replace the brake shoes with the wheel cylinders?
The side that was leaking is saturated with fluid that will cause the brakes to lock up. Replace the shoes and clean the drums and backing plates with denatured alchohol or brake cleaner. Buddy
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I know the "VOICES" aren't real but they have some great ideas. 1978 GMC Sierra Classic C25 1983 Datsun 280ZX Turbo 1997 Chevy Cheyenne K2500 1999 Polaris Sport 400 |
03-23-2015, 11:20 PM | #15 |
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Location: Yakima, WA
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Re: Tires Squel When I Brake - Why?
Buddy_1 has the answer to your problem. Getting brake fluid on the shoes will surely cause this kind of problem. New shoes and either replacing the drums with new or doing a super cleaning job should cure the problem.
Bod bless, Terry |
03-24-2015, 12:52 AM | #16 |
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Re: Tires Squel When I Brake - Why?
No I did not.
Thank you very much, that is sound advice, I will do just that this weekend. I am a bit hesitant with replacing the shoes without replacing the drums or at least turning them, that was one of the things my daddy taught me, so we'll see how that goes. Thanks again |
03-24-2015, 07:39 PM | #17 |
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Re: Tires Squel When I Brake - Why?
I saw a youtube video where a fellow cleaned off brake shoes saturated with brake fluid and made them work. I would give it a try if I had the problem - in the interest of science - but most will tell you that it does not work.
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03-25-2015, 09:28 PM | #18 |
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Re: Tires Squel When I Brake - Why?
when I take apart the entire ensemble I will look to see if anything could be binding
I am curious if swapping the guts from one side to the other and the drums would be worth it in terms of troubleshooting, would it be safe if I kept the shoes and drums together? I really don't like to just throw money at the problem to fix it instead of understanding and seeing what the actual specific problem is, you all know what I'm trying to say? |
03-26-2015, 12:00 AM | #19 |
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Location: Northern California
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Re: Tires Squel When I Brake - Why?
Brake shoes are cheap and it would be a worthwhile investment. You replaced the cylinders and that didn't fix it. Do the shoes and even put in a hardware kit to make sure everything is working right.
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03-26-2015, 03:34 PM | #20 |
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Location: San Antonio, TX
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Re: Tires Squel When I Brake - Why?
I'm having the same problem with my '87. I replaced both brake cylinders and shoes and still locks up. This only happens when I first drive it. After braking several times, all is good. Only thing I haven't done is replace or turn the drums. I also bled the brakes several times thinking there was air in the lines.
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03-28-2015, 12:17 AM | #21 |
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Re: Tires Squel When I Brake - Why?
OK, so decided to take off the drum and take a look, and when I did this fell out, I call it the shoe spreader, not sure what it is called
I guess this would explain at least why initially I thought the problem was fixed, it probably worked fine till this somehow fell out then the wheel started locking up again anyway I put it in all nice and proper this time and wanted to take the truck for a test drive, but the darn thing won't start, now I don't want to get off on that tangent but I will tell you I just bought a new battery and hope to put it in tomorrow and report back to you |
03-28-2015, 09:43 AM | #22 | |
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Re: Tires Squel When I Brake - Why?
Quote:
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03-28-2015, 01:49 PM | #23 |
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Location: San Antonio, TX
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Re: Tires Squel When I Brake - Why?
Axle seal is not leaking. I'm going to take the drums off and get them turned. Hope that solves the problem.
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03-28-2015, 02:02 PM | #24 |
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Join Date: Mar 2015
Location: Manchester, CT
Posts: 433
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Re: Tires Squel When I Brake - Why?
Check to see if your e-brake cable is "frozen" to the offending side. You should be able to actually pull the main cable and hear the e-brakes expand/contract on both sides if your cables are good
Lee |
03-28-2015, 09:02 PM | #25 |
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Join Date: May 2010
Location: San Antonio, TX
Posts: 102
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Re: Tires Squel When I Brake - Why?
The park brake is good and not binding. I did tear it apart again today to find a cracked brake shoe. I replaced both sides again and also had the drums turned. I'll find out tomorrow morning if all is good.
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