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Discussion Starter #1
Hey all!

A couple years ago we got our mustang running again and we ran into some problems that we just can't fix. We changed the back leaf springs because they were pretty worn out and the car would bottom out with any sort of weight in the back. We put heavy duty springs on it and the problem was fixed, the car sits nicely now. But after that we noticed a horrible knocking noise in the front end. Going over slight bumps or cracks in the road puts out this loud metal to metal knocking noise. If you are going over a speed bump or a big dip in the road you won't hear it but only on the rough, sudden bumps it is noticeable. We've changed somethings since the including putting new shocks on the front but it just won't seem to go away. Recently we looked at the sway bar bushings and noticed they were really dry rotted and decided to change them. We took those out and there were big holes missing in the sides of the rubber bushings. We thought that was it but that wasn't the case. It didn't make any difference. We listened really good over bumps and it just sounds like there's small gaps between metal pieces to where when you go over bumps it clanks around. At this point we have no idea, it's just the front end. Any ides would be appreciated!

Thank you!
 

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Spammer Hammer
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Power or manual steering. I had/have a similar situation on my ‘66 with PS. Completely new front and rear suspension and steering. Could not find the problem. Finally put a GoPro in many locations until I found the problem. The problem in my case is the PS stud in the cylinder where the pitman arm attaches. Even though it’s within spec, it makes metal to metal noises when going over bumps as the ball moves around in the cylinder socket.
 

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Replacing the strut rod bushings is a good start but also mandates that you have the front end re-aligned. Any good alignment shop will be happy to point out the failing parts on your front end. Probably a good way to solve the unwanted noise problem and may even improve the cars drivability ?Brian
 

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Discussion Starter #7
Yea at this point I think we are just going to slowly start tearing the front end apart and see what we can find. My dad got the car back in the early 80's with nothing in it but the front windshield but it still had all the suspension. They changed a little bit of it but most of it is still original. All of the bushings and seals need to be replaced anyways, they are all dry rotted.
 

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I can think of lots of places that will cause a clunk with a stiff bump. Strut rod bushings, upper control arm shafts, ball joints - basically every part in the system.

Good plan to replace everything. I do recommend you purchase brand name parts from an automotive vendor, not a Mustang restoration supply house. Been there, done that, had to deal with the crap quality parts. If it's not Moog, TRW or another name I'm familiar with, it's not getting bought. I worked up a front end kit for a friend with a 70 coupe and it came to about $450 with all Moog parts at RockAuto.
 

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1967 Mustang GT fastback
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+1 on the replace/rebuild the whole front end, then you start with a clean sheet. I'll give a plug for Opentracker, he's got everything you'll need. And his upper A arms are blueprinted so the cross shaft is assured to be dead perpendicular to the arm so you get accurate alignment specs.
 

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Discussion Starter #10
Well thank you everyone for the ideas and tips. We'll look into it and tear it apart. For right now I think we'll just look into fixing the problem but a complete rebuild is the plan down the road. I'm a little bit more adamant about working on it than my dad but we'll get it done. That's really the only problem with the car, other than that it is just minor stuff. Thanks guys!
 

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I had a similar noise in my 65 fastback, manual steering. In my case it was the front sway bar end link bushings. Links and bushings come as a kit and are not very expensive.
 
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