Faint sound of metal

[draggin49]

So i had my car jacked up in the rear . With the car in neutral if I spin the tires by hand I can hear a faint noise that sounds like metal maybe scraping . Doesn’t do it throughout the whole time the tire spins just around a certain time of the tires rotation.

I wasn’t driving the car hard . Was doing 45mph just cruising along and I heard this really loud noise from the rear of my car sounded more like rear drivers side .Pulled over , inspected and couldn’t find anything . I drove the car home and it didn’t make any noise . when I was pulling into my bumpy driveway I heard sort of a clunking noise from the rear of the car when I went over the bumps.

Any ideas ?

[Lawrie]

brake shoes or spring for the shoes.
lawrie

[Graeme / New Zealand]

I'd go with Lawrie. I had a brake spring cut lose at one end once and had the same noise.

GB

[19Fordy]

Also check to see if the brake drum is contacting the backing plate.

[draggin49]

Originally Posted by 19Fordy

Also check to see if the brake drum is contacting the backing plate.

I did hear a bit of rubbing occasionally when I would apply the brakes fully . So it may be making some contact between drum/backing plate

[draggin49]

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the piece I hear loose inside the drum sounds like a small piece of metal , I agree I’m thinking it’s a broken brake spring

[Flathead Fever]

I vote broken brake spring too. When they get to be around ten-year's old they start breaking. If your doing a brake job and the springs have not been changed in years its a good idea to replace them. That's what we did on a fleet of 400 vehicles at work. We were getting a lot of broken brake springs. We got in a habit of replacing them every few year's and that put an end to the broken brake springs. Do not grab the springs with plyers, it leaves little marks on the spring that could cause them to break. Use a brake spring tool that installs them by the curved ends.

[Talkwrench]

So long as its not the ol' pin coming out of the drive shaft sleeve..

[ford38v8]

Originally Posted by Flathead Fever

I vote broken brake spring too. When they get to be around ten-year's old they start breaking. If your doing a brake job and the springs have not been changed in years its a good idea to replace them. That's what we did on a fleet of 400 vehicles at work. We were getting a lot of broken brake springs. We got in a habit of replacing them every few year's and that put an end to the broken brake springs. Do not grab the springs with plyers, it leaves little marks on the spring that could cause them to break. Use a brake spring tool that installs them by the curved ends.

Dayum! That makes sense!

[draggin49]

I have a set of 1940’s ford brakes for front and rear , gonna have them installed when the new motor goes in in the next few weeks

@talkwrench whereabouts is the pin you mentioned ? I will take a look

[19Fordy]

Originally Posted by draggin49

I have a set of 1940’s ford brakes for front and rear , gonna have them installed when the new motor goes in in the next few weeks

@talkwrench whereabouts is the pin you mentioned ? I will take a look

I think these are the pins Talkwrench is referring to. They hold the splined coupler that connects the drive shaft to the rear pinion shaft in place. They are sweged in place with zero play.

[draggin49]

Originally Posted by 19Fordy

I think these are the pins Talkwrench is referring to. They hold the splined coupler that connects the drive shaft to the rear pinion shaft in place. They are sweged in place with zero play.

Thanks for the pic! That helps understand where and what much better .
Now if one of those pins in the picture was loose or came out would the source of the noise be in that area where the pins are ?

[Mart]

When I've had problems with the pin backing out (actually it was a bolt I had fitted) it caused a scraping noise, but at a higher frequency than a scraping noise that you would get from a hub area foul condition.