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Old 06-17-2009   #1 (permalink)
danielf is offline Apprentice


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Fort Mojave   Arizona
Default 1966 Mustang Suspension problem

Ok so all of the new Grab-a-trak spring and handling parts are on as well as new oem upper and lower control arms, ball joints, bushings, the whole deal. The thing rides FANTASTIC!!! But theres a small, er...LOUD problem. Coming form the front right is a HORRIBLE sound. Its sounds lke a metal to metal grind or more appropriately a sound like an old door in a spook film slowly opening. If is hit a bump, it makes that sound. If im making a turn, it makes that sound. If i hit the gas, it makes that sound. Hit the brakes, makes that sound.
So the mechanic ( ford/mustang guy) said it was the left upper control arm bushing kit, or the parts that bolt the arm to the car. He said he greased it, drove it, greased it, drove it and still cant figure out why its making that sound. I bought all the parts from Mustangs Unlimited and the Grab-a-trak kit form Mustangs Plus.

Anyone have an idea on what it could be or why its doing it? Like i said, its all brand new and proffesionaly installed. Even the installer cant figure it out. He said just drive for a while and when i bring it back for a "300 mile instpection" He will check it out. I mean its so loud even on the outside that its hideous and i dont even want to drive it. I cant even enjoy the new ride quality because of that sound. I dont know what to do. Again any help would be really appreciated. Thanks
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'66 Fastback 289/c4: Edelbrock Performer 600cfm carb, 1" spacer and intake manifold, Pertronix ignition, Tri-y headers, Grab-a-trak suspension, dual 2" exhaust, B&M Shift Kit, Trac-Lock rear.
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Old 06-17-2009   #2 (permalink)
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Screw the 300 miles he needs to look at that control arm and spring perches . You don't want to drive the car the way it is because you might damage something.
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Old 06-17-2009   #3 (permalink)
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Also if the installation is done right you won't have any horrific noises
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Old 06-17-2009   #4 (permalink)
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Why would the sound come from the right if it's the left upper control arm? What about the spring perch? It is on the upper control arm, and if it is a roller perch, it could squeak. Other than the ball joints, that about all I can think of. Or maybe the shock itself.
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Old 06-17-2009   #5 (permalink)
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Im sorry, did i say right? I meanleft. BUT now i was playing with it and it is coming form both sides. It has NEW...

upper control arm kits with ball joints
lower control arm kits with ball joints
oem type spring perches
front coils
front sway bar
endlinks
rear leafs
shocks all around

i mean its all new. It was professionally done by a mechanic. He said it shouldnt be doing that and to bring it back first thing in the morning. So well see what happens from there.
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'66 Fastback 289/c4: Edelbrock Performer 600cfm carb, 1" spacer and intake manifold, Pertronix ignition, Tri-y headers, Grab-a-trak suspension, dual 2" exhaust, B&M Shift Kit, Trac-Lock rear.
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Old 06-17-2009   #6 (permalink)
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Are the uppers shimmed correctly? If not, as the suspension moves the arms could be bumping the shock towers through the bolts in the holes in the shock towers, since you said it's now coming from both sides. Shine a flashlight behind the coil and check to see if there's a gap back there where the bolts pass through the shock tower. There may have been some shifting/settling from initial first use.
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2003 V-6 - the usual bolt-ons. Gremlin taking up residence in the idler pulley. I'll finish this one when I'm done with the other one.
1965 coupe - Born - straight six standard issue
Now - 5.0 motor, T5 tranny, R&P, full length subframe connectors, draglink bars, hedman headers
Coming soon - disc brakes, electronic ignition and a whole host of other stuff I forgot to mention. The list goes on and on. Basically, it's my new toy
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Old 06-18-2009   #7 (permalink)
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Ok, ill take a look before i go tomarrow. Thanks.
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'66 Fastback 289/c4: Edelbrock Performer 600cfm carb, 1" spacer and intake manifold, Pertronix ignition, Tri-y headers, Grab-a-trak suspension, dual 2" exhaust, B&M Shift Kit, Trac-Lock rear.
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Old 06-18-2009   #8 (permalink)
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one other simple thing you might try. take some wd 40 and squirt your sway bar bushings thouroughly. if you installed polyurethane bushings they can make a terrible sound. squirt them thouroughly and if it does not go away than that is one less thing to worry about.
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Old 06-18-2009   #9 (permalink)
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Yeah its not the poly. We sprayed it all real good with graphite and it was nice and quiet, we even took off teh swaybar al together and its still making that sound. Hes tearing it apart right now. Theres a possibility that i just got some defective parts? Idk. Just have to wait and see i guess.
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'66 Fastback 289/c4: Edelbrock Performer 600cfm carb, 1" spacer and intake manifold, Pertronix ignition, Tri-y headers, Grab-a-trak suspension, dual 2" exhaust, B&M Shift Kit, Trac-Lock rear.
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Old 06-18-2009   #10 (permalink)
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oh well it was a thought. hope you get it all straightened out.
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99 f150 extended cab 4x4 with kennebell supercharger
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Old 06-18-2009   #11 (permalink)
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Default I want to guess!

even professionals mess up! They're human right?

Dne' here! I want to make a guess!! I'm going to guess that you have a LCA rubbing on its own frame channel. These old cars get banged up badly on the frame, strut channels, etc.! They may look straight, but when you put them back on the ground, with a new unbent LCA, and the LCA's in it's recessed channel, it may easily do what I said. I hope it was a simple fix! you sounded so excited about it!
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Old 06-18-2009   #12 (permalink)
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Default Fantastic!

Ok just got it back. He said he couldnt figure it out. He took the whole thing apart again checked everything out and resinstalled it. So, now its fixed and we have no idea what it was. So its fixed, no i can enjoy the ride, which i might say is a bit stiffer then i wanted but is SOOOOOO much nicer then the 43 year old suspension before. Next will be the trak-loc and 3.25 rear end. Gotta get this thing off the line and going!!!
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'66 Fastback 289/c4: Edelbrock Performer 600cfm carb, 1" spacer and intake manifold, Pertronix ignition, Tri-y headers, Grab-a-trak suspension, dual 2" exhaust, B&M Shift Kit, Trac-Lock rear.
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Old 06-18-2009   #13 (permalink)
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My guess would be ball joints. My '94 makes some annoying metallic squeaking sounds whenever I turn the wheel, go over a bump, whatever. The ball joints sometimes aren't properly greased, so metal contacts metal and that's what it sounds like.
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Old 06-20-2009   #14 (permalink)
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Fort Mojave   Arizona
Default Not over yet...

So today i took the car out on Joy lane. Joy lane is my "test track" for any kind of mods i make to my cars. There is this 2 mile perfectly straight stretch out in the middle of nowhere. Perfect for really opening the thing up...

And open her up i did. I punch her and she left a nice patch of rubber with tire smoking and screaming....she ran hard all the way to 55mph..CHIIIRP into second she shifted up to 80 and into third... then i notice it was wondering.....BAD! So i let off teh gas and i could almost barely handle the car she wanted to go all over the place. so i hit the brakes and she wanted to pull right, i steered tothe left and it was side to side all over the road. I finally got it straight and got back on the hwy. Now then, the ride home on the hwy was fine. Steady cruise at 55-60 mph no problems.

I seriously think this new suspension is too stiff for this car. I mean i never noticed it before on any other car but with this car now, any time it hits any bump in the road it wants to "wonder" like its so bouncy it cant stay straight. I dont get it. Im gonna take it back to the shop Monday and have the guy ride with me so he can see. The last thing i need is to be going on the freeway at 75-80mph and loose control and crash. This car has been nothing but a headache ever since i put on the suspension. I really dont know what to do at this point. Ive spent so much money on parts and labor and it has been nothing that good yet.
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'66 Fastback 289/c4: Edelbrock Performer 600cfm carb, 1" spacer and intake manifold, Pertronix ignition, Tri-y headers, Grab-a-trak suspension, dual 2" exhaust, B&M Shift Kit, Trac-Lock rear.
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Old 06-21-2009   #15 (permalink)
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please keep me posted on your problems and hopefully solution. Im currently looking at buying the grab a trak suspention and would really appreciate any info. on a side note my 67 fastback, with stock suspention, also wanders really badly when i accelerate or let off the gas. isnt that what is known as bump steer and dont they make kits to fix that?
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