Rattled by the rattle

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Jayro

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Joined
Mar 30, 2022
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My Car
73 mustang baby blue with clevo 351
Ok so car is coming along well. Running nicely now. Only issue I’ve got that I’m trying to sort is a knock or rattle noise seemingly coming from the front suspension on the left hand corner.

On a nice road there is no issue but when on a bumpy road it is a constant noise on every little bump. I replaced the upper and lower control arms and that sorted all my squeaky suspension noises but this bloody rattle is still there.

Any suggestions please?

Cheers
Jase
 
Joined
Oct 9, 2018
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Location
Marysville Ohio
My Car
1971 Mach 1 - "Day 2" restoration; 351C/FMX, trick flow heads, roller cam conversion, CAA AC kit, upgraded springs/shocks & close-ratio steering box
Look for the simple things first - check anti-sway bar links, if too loose, they can rattle a little.
 

Sheriff41

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Aug 5, 2019
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Location
Texas
My Car
72 Mustang Q-code
Strut rod bushings, worn/weak shock, loose bumper mount, etc. Raise the car and thump around underneath with a rubber mallet or dead blow hammer.
 

detritusmaximus

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Sep 21, 2013
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Location
US
My Car
1973 Grande #1 looong time ago
1970 Sportsroof #2 almost as long
1971 Sportsroof M-code #3 needs money
2008 GT #4 where the money went
Look for the simple things first - check anti-sway bar links, if too loose, they can rattle a little.
And the swaybar to frame mounts. A little shrinkage in the rubber will produce some play that disappears the mount you raise the car.
Or, as happened on a car I worked on, the new replacement rubber mounts were for a slightly larger bar.
 
Joined
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Location
SW Ontario
My Car
1971 Mustang Mach 1, M code, 4 speed.
Don't you just hate rattles or thing that go bang, but only at times depending on the road you're on?
On my car, I get this loud bang sound from (I think) the front left as well. This is only present when I go over say, a manhole cover that is raised too much. All the front end is new and nothing seems to be loose or otherwise faulty. I guess the only way is to put the car on a hoist and literally go over everything, one part at a time.
Not to make this about my car, but it seems similar to your issue. Hope you find it so I may be able to find what causes my noise too.
 

Aus73Mach1

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Aug 5, 2019
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Location
QLD Australia
My Car
1973 Mach 1 Sports Roof.
Q code. 351-4V
C6 Auto, 3.25 Rear Axle, AC, Power steering.
A couple of rattles, bangs and squeaks I have fixed on my new suspension over the past 12-18 months.

Strut rod bush crumpled on LH side creating loud metalic bang under brakes or rough surfaces. Poor quality rubber. The strut rod bush had a piece missing on the underside causing the strut rod to hit the mount. It was not easy to see hidden behind the large washers.

LH Lower control arm bush outer steel case loose in control arm. Poor quality repro. Would cause metalic "noises" mainly on rough surfaces & turning.

Remaining squeaks turned out to be the front sway bar bushes, well lubed. I have since upgraded the sway bar (good USA build) that came with non-lube bushes. No more squeaks and much better handling.

I had checked several times for the source of the problems, loose bolts, brakes, shock absorbers, etc. The above issues were only identified on closer inspection.
David
20210513_124001.jpg
 

fmjcraig

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Location
Clinton Township, MI
My Car
1973 Mustang Deluxe Convertible
351c 2V Auto Ram Air
[url=https://ibb.co/cf86fv][img]https://preview.ibb.co/dT9ZYF/IMG_0225.png[/img][/url]
I experienced the same annoying rattle in the front that I couldn’t initially find, over our lovely potholes, searched and rubber hammer-pounded, and then finally...the rubber sleeves that the caliper slide pins reside in were completely deteriorated or missing so the moveable caliper assembly would bang up and down on the exposed metal...O’Reily auto parts had them in stock (warehouse) $4 for 4 and greased and replaced, rattle gone forever...hope you find your rattle
 
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