Track Arm To Frame Brace - Chevelle Tech
Brakes, Suspension & Steering Conversion questions & more.

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post #1 of 21 (permalink) Old Oct 10th, 19, 9:25 AM Thread Starter
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Track Arm To Frame Brace

Ok experts, school me on this one. Getting ready to rebuild the rear suspension on ole Heavy. New springs, shocks, track arm bushings etc. Got her up on jack stands and got to looking around. I noticed that this car (72 Heavy Chevy Chevelle) with a 350ci 4 barrel, 350 auto trans and a 12 bolt single track has the braces that run from the lower track arm front mounting bolt to the frame (see photo). From what I understand. These braces were only put on SS cars. No big deal and I'm pleased that they are there. Just wondering?? I will be adding boxed lowers and factory style sway bar when it goes back together. Thanks in advance for the info!
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post #2 of 21 (permalink) Old Oct 10th, 19, 11:35 AM
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Re: Track Arm To Frame Brace

They were put on other cars as well, I believe all convertibles got them as did other A-body's as well (GTO, Cutlas) My 350 Malibu 2bl 10-bolt had them as well.

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post #3 of 21 (permalink) Old Oct 10th, 19, 11:55 AM
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Re: Track Arm To Frame Brace

I believe all Monte Carlos had them as well. Unless you're the original owner or know the original owner it's impossible to know at this point if it was stock or if they grabbed them from the junkyard.
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post #4 of 21 (permalink) Old Oct 10th, 19, 12:07 PM
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Re: Track Arm To Frame Brace

Not just SS cars.
72 small block, 2 barrel Malibu cars with 12 bolt non posi had them.

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post #5 of 21 (permalink) Old Oct 10th, 19, 12:58 PM
 
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Re: Track Arm To Frame Brace

Most aftermarket manufacturers (like UMI) make versions of this type of brace. They really help things move around a lot less back there...
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post #6 of 21 (permalink) Old Oct 10th, 19, 1:51 PM Thread Starter
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Re: Track Arm To Frame Brace

AH, So they weren't just put on the SS cars. Thanks for the lesson everyone! I'm glad this car has them. Should help out with future plans I have for the car. Thanks Again to all.
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post #7 of 21 (permalink) Old Oct 10th, 19, 1:57 PM
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Re: Track Arm To Frame Brace

I like em...added boxed uppers SSM lowers sway bar then tied into the spring pockets going across with a simple piece ofsquare tubing
0 wheel hop, car does not go to one side when spinning most times any more. real easy to control.
Used Edelbrocks, fit perfect.

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post #8 of 21 (permalink) Old Oct 10th, 19, 11:45 PM
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Re: Track Arm To Frame Brace

I don't know the whole history of my Malibu, but it has them. It came with a 350, 2bbl, 10 bolt posi. They sure looked like they were there forever.


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post #9 of 21 (permalink) Old Oct 11th, 19, 12:48 AM
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Re: Track Arm To Frame Brace

Heavy Chevy's got some of the stuff that Super Sport's got right, so why not the frame braces ?

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post #10 of 21 (permalink) Old Oct 11th, 19, 9:07 AM
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Re: Track Arm To Frame Brace

Did all El Caminos as well get those?

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post #11 of 21 (permalink) Old Oct 11th, 19, 10:49 AM
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Re: Track Arm To Frame Brace

My 69 SS396 elco has them...
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post #12 of 21 (permalink) Old Oct 22nd, 19, 8:29 PM Thread Starter
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Alright guys, I’ve got the rear end all apart. I’ve read a thread on here that said the upper track arm (driver side only) on a 12 bolt has a reinforcement built into it. After looking, mine has the little reinforcement plate. So far so good. I purchased a complete replacement kit. Upper arms, lower arms (boxed), sway bar, bushings already installed. Thing is, the new uppers are the same, “no little reinforcement plate”. What is the purpose of this reinforcement plate? Is it truly needed? GM put it there for a reason. I’m to the point of cleaning up my factory ones and putting new bushings in them and back on the car. Can anyone shed some light on this for me? Again, thanks in advance y’all!
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post #13 of 21 (permalink) Old Oct 22nd, 19, 9:20 PM
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Re: Track Arm To Frame Brace

Quote:
Originally Posted by 72YF3 View Post
Alright guys, I’ve got the rear end all apart. I’ve read a thread on here that said the upper track arm (driver side only) on a 12 bolt has a reinforcement built into it. After looking, mine has the little reinforcement plate. So far so good. I purchased a complete replacement kit. Upper arms, lower arms (boxed), sway bar, bushings already installed. Thing is, the new uppers are the same, “no little reinforcement plate”. What is the purpose of this reinforcement plate? Is it truly needed? GM put it there for a reason. I’m to the point of cleaning up my factory ones and putting new bushings in them and back on the car. Can anyone shed some light on this for me? Again, thanks in advance y’all!
Dave, the reinforcement on the control arm was done because the 12 bolt pumpkin is larger near the ear where the arm attaches to the bushing. The control arm had to be clearanced on the inside to prevent binding on the pumpkin. I'm sure it was a GM cost cutting measure to use only one design for the upper arm and add the reinforcement plate for 12 bolt rears.

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post #14 of 21 (permalink) Old Oct 22nd, 19, 9:51 PM
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Re: Track Arm To Frame Brace

The frame braces were only on 66 and 67 SS cars. Not other models.

After that I believe the engineers realized they were needed on other models too.

It's just a simple case of evolution.

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post #15 of 21 (permalink) Old Oct 23rd, 19, 9:16 AM Thread Starter
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Dave
 
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Re: Track Arm To Frame Brace

Randy,
Thanks for the info. Makes perfect sense. Still wondering if the new ones I purchased (uppers) would be OK to use and not cause any issues that I would have to go back and remove them and reuse the factory originals. I'd really like to do this only one time. Again, I'm leaning toward cleaning up the originals (still in really good shape, nothing a wire wheel wont clean up) putting new bushings in them and putting them back on the car. Wish the places making re-pops of some of this stuff would pay more attention to the little details when reproducing these parts. Ha! Thanks again for the lesson.

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