Technical 53 Chevy - Beeping Noise when Stopping

I don't know, If you look closely at the video he comes to a complete stop and it's still making
some kind of noise, not a beeping noise. I'm wondering if it's a belt.

 

In that video (and I remember when I was recording it) the beep noise went away before coming to the complete stop. There are other noises, rattling, chirping, etc... that's from the shifter lever vibrating, and rattling from the splash guard vibrating.

 

Did you use something like disc brake quiet on the pads? Permatex and others make it. Spray it on the metal side of the pad and it keeps the pads from rattling. On GM outer pads, they have little tabs on them that should be tight to the caliper body. I bend them first so they clip hard onto the calipers. It may be the problem.

 

Interesting. No I did not use the disc quiet orange stuff, though I have that on the shelf. I used ultra premium Semi-metallic pads from NAPA. I had the debate on whether to use organics, etc... so I cleaned them up and took them back to NAPA. The metal shim for the outer pad came off and I used that as an excuse to return them.

Here are photos of the ones I returned prior to cleaning them up.






Then I bought the same pads from another NAPA store after being told semi-metallics would be the best choice. This is the same time I returned most of the brake parts from Speedway (for partial refund) and bought a different set of caliper brackets since their kit led to an uneven gap between the pads and rotors. The caliper brackets from CPP required taking the calipers off and on so many times to modify the caliper brackets so there would be no uneven gap between the pads and the rotors. After that work, one of the outer pad shims was coming off like the set I had returned before. I greased the outside of it and managed to make it stay in place long enough to install it. I don't know if that's causing the noise. I doubt it but who knows right?

I wonder if I can further isolate the noise to being brake related by shifting to neutral, letting it stop on its own, etc etc.

 

[QUOTE
I wonder if I can further isolate the noise to being brake related by shifting to neutral, letting it stop on its own, etc etc.[/QUOTE]

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I'd also turn the engine off after shifting to Neutral at about 30 mph in preparation for a brake test.

 

That makes sense too. I'll come up with a test matrix and think of a quiet street I can do some runs.

 

Let us know, I remember the post on the Speedway vs. Napa pads.

 

I drove it just a little while ago for a decent amount of time. The noise doesn't appear until 10 min or so of driving. In one instance I still heard the noise when braking and releasing the pedal.

Then at about 25 mph I slipped it in neutral from Drive without touching the pedal and then I heard the squeel/beep but with a different sound signature. I'm thinking its a transmission/driveshaft related effect. The trans. fluid is at the correct level. Would a vacuum leak on the line going to the trans possibly cause this? It is old, that much I know.

Anything else I should check besides the u-joints which I haven't done yet?

Photos from today's drive

 

Do you have a spring on the brake pedal ?

 

First time that I've seen photos of your car. Maybe it beeps because it's happy. Nice Chevy.

 

Yes I do, a pretty rugged one made by Dorman. I think the noise is not brake related. There is some screech/squeel when I press on the brake pedal a little harder but it only happens when pressing on the pedal harder and only sometimes and it immediately goes away when releasing the pedal. That is a completely different noise. I heard this today but hadn't the last couple of times I drove it. I also only hear it if a car is next to me where the sound can echo.

The noise I'm referring to originally in this thread happens when slowing down but not necessarily when the pedal is being pressed. I found this out today. I also noticed it comes back (though with quite a different signature) when shifting from drive to neutral but not touching the brake pedal.

 

Speedometer gear and cable could be another source of weird noise too.

 

Thanks, that is interesting. I did take it out at one point to service the seal but can't recall it was making the noise after that.

 

The sound is so faint in your video. Didnt sound like brakes to me. I would characterize that as more of a "whine". Are you running the correct trans fluid? How about the rear end?

 

My drive shaft guy says people over tighten the U bolts on the drive shaft and it causes the bearing too squeal.

 

Yep, at 8 seconds that's brake squeal from glazed parts. Its hard to pick it up with all the other racket but that's where my money is headed.

 

Thanks I drove it more since that video. The noise appeared while shifting the trans from drive to neutral without evening touching the brake pedal. This is the behavior I got yesterday. It's a different sound signature but in the same frequency range for sure!

I don't think it's brake squeel from glazed parts. The noise is exactly the same duration every single time. In another test the same exact signature noise as in the video came in after taking my foot off the pedal while the car was rolling still.

 

Thanks, I am running Valvoline Dex/Merc Max Life ATF fluid (I remember it had said recommended for GM on the containers). This is new fluid put in July.

In the rear end I have 80w-90 Valvoline gear oil. This was put in July as well. The front seal on the differential leaks but the fluid is at the level of wherever the front seal leak is. I could feel fluid in there last time I opened the plug and stuck my finger in there.

 

That's interesting. I haven't touched the drive shaft at all the entire time I've owned it. I can't really remember if I heard that noise the entire time I've owned it. I have done work to the transmission though (changed several seals), new pan, gasket, new fluid, new filter, new rooster comb.... hmmm. Fluid seems to be at the right level.

 

I wonder if its the rear end..... Back when I was into more modern mustangs (90's) I know if guys changed the rear end, some manufacturer's gears were known to whine some. Mine did ever so slightly in lower downshifts.

Not sure about that max life trans fluid either. Thatd be my two areas of focus.

Maybe you can get some other videos capturing the sound better?

 

Thanks, I can try to get more video next time I drive it.

 

Is the inlet manifold / carb, tight and sealing ?? I had a vacuum leak / squeal, when the motor warmed up, noise appeared on over run and idle.. Check it out with a can of "engine start" sprayed around the joins, if there are any leaks the idle speed will alter.. Turned out the aftermarket Edelbrock manifold I had fitted a while earlier needed retightening..

 

Try greasing the u joints. Doesn't make sense to be the source, but does sound similar to an old 86 Ford truck at work. Had a bad U joint, and a loose pinion nut

 

U-joints can make a chirp, but usually heard during initial take off. You should take another car guy for a ride one quiet night, or try to drive the car past them so they can hear it too. Of course it won't make the noise them.

I've been driving old cars for decades and have thrown together more **** that had no reason to work so well and with no weird sounds. Or maybe I tune them out... you have to expect a certain amount of that, unless you are driving a Prius.

 

Maybe the transmission filler tube has yet another hole in it.

 

earplugs

 

Nope, I actually took the damn thing out and visually checked a couple weeks ago. No more holes, it's secured in a way it won't rub on anything that will cause holes. The previous owner had it dangling and hitting the valve covers which eventually wore a huge hole in it.

 

Thanks, I'll check for that. It seems to be transmission related. Maybe the vacuum line. I don't hear the noise when revving the motor up and down slowly or during idle after it's been warmed up.

So far I've heard it only when shifting gears (from drive to neutral) or when slowing down. It seems to happen slowing down after it goes from 2nd to 1st.

 

+1 on greasing the U-joints. Quick and easy thing to eliminate as a potential cause of the sound.

 

might have been brought up already, could it be the shifter is out of adjustment a little, like its in between gears slightly, stranger things have happened... or maybe rearend, axle seal or bearing?