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Old 03-28-2010, 10:08 AM
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Broken 4-bar rear suspension 1930 model a,help

I have a 30' model A street rod .the rear 4-bar suspension (parallel type) has a broken tube(passengers side upper and closest to the rear axle,the part that the bolt goes thru...best i can describe it is the bushed piece of the bar used to look like an 'O' now it looks like a 'C'. the bolt is still in the piece welded to the axle the lower arm is intact,however the axle has slipped slightly down and towards the front of the car. should i just remove the damaged arm and repair and replace w/ a new bushing ? i'm perplexed can someone tell me how i should fix this,please?

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Old 03-28-2010, 10:46 AM
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a pic would be nice.. but it sounds like the bar end failed.. Speedway as well as other places sell new bar ends. if everything else is in order. replace the bar end and see where you end up
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Old 03-28-2010, 10:52 AM
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Yes.. a picture would really help..
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Old 03-28-2010, 11:41 AM
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Picture ? I'll try right now

I'll take a picture right now however I'm not real confident I know how to send it to you or post it on this program. Thanks for taking the time to answer..I'll do what I can....
SPRING66
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Old 03-28-2010, 11:43 AM
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just click post reply.. then scroll down and look for the " Manage Attachments " button and click it
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Old 03-28-2010, 04:44 PM
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If it is the end of the bar with the welded on tube for the bushing, then either weld on a new tube for the bushing or replace the whole bar. If it is the end with the threaded on bushing, replace the end and the tube should be fine. Look into why it broke, that isn't typical for that type of rear suspension.

Andy
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Old 03-29-2010, 07:30 AM
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4 bar

Iam so sorry it took all this time to reply ,but i CAN'T send a picture until I get somebody over here who knows how to do it.I have tried for hours w/no success,Don't know what I'm doing wrong etc.
Anyhow,I removed the broken bar(only pieces of the bushings were still there,and that seems to be an issue with all the other components also ...no bushings or only fragments remain).
As I said before,the top bar pulled out from the weldment on the rear axle.I have a 9" Ford rear end. Where the drive shaft connects to the rearend is now pointing upward where it used to be level(like it's trying to "jack-knife") so the rear end has moved toward the back of the car where the top bar attatches and toward the front of the car where the lower arm attatches (it pivoted ).I've had the car less than a year and I realize that the fact that the bushings have not been changed out is just gross neglect of regular maintenance.
How in the world am i going to re-position the rear axle to where it is supposed to be? You may get the impression that I am in a PANIC state of mind and you would be correct.any help (including therapy) would be welcome. thank you
SPRING66
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Old 03-29-2010, 07:09 PM
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Are any of the other three links bent?

Are the mounting brackets to the frame or the axle bent?

If not, three links will hold the axle in the right position. The two lower links will hold the axle in the correct position in side view, and the one remaining upper link will hold the pinion at the correct angle. The fourth link is for additional strength. If the axle is all jacked around like you describe, the other links, mounts or bushings or a combination of more than one thing is amiss. You mentioned the bad bushings, is that all the damage?

Look closely at what is bent or broken and go from there. If it is just bent bars and bad bushings, that would be an easy fix.

Andy
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Old 03-30-2010, 09:55 AM
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4-bar

Andy,
Thanks for taking the time to answer.After further thought and inspection,
none of the remaining bars are bent,the brackets are ok the pinion still
seems to be pointing a little more upward than i recall.Anyhow I repaired the
damage to the bar, by bending the end around 13/16 socket and then mig
welded the seam.My Junk drawer produced a couple rubber bushings that
with a little work were made to fit temporarily until I can find someone in
So.California that sells the proper urethane replacements.The bushings in the coil-overs are also FUBAR.Do you know of anyone who sells those bushings?
I don't think it is in as bad of shape that I origionally thought,but I need to get the proper parts before doing any cruisin'
Thanks Again,
SPRING66
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Old 03-30-2010, 12:30 PM
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McMaster Carr has all kinds of bushings..you need to know od and Id of bushings and what kind of material that they need to be made of..

Sam
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I have tried most all of it and now do what is known to work..
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Old 03-30-2010, 12:36 PM
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bushings

Thank You Sam,
There's a McMaster Carr not too far from my house,I didn't think of them
at all. I was looking for Hot Rod/Hi-Performance businesses and didn't have
much luck. Thanks Again
SPRING66
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Old 03-30-2010, 01:33 PM
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Pete and Jakes sells the urethane bushings you are looking for, you can order from them direct or look to T.C.I. or an aftermarket frame manufacturer for them as well.
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Old 03-30-2010, 02:11 PM
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4-bar

Thanks for your help.
There is a place called origional parts group inc. or www.opgi.com
Located 4 miles from my house.they specialize in Chevelles and
El Camino restoration.
T.C.I. is also a good source I had forgotten about ....middle age comes
at a bad time!!
Thank You
SPRING66
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Old 03-30-2010, 04:54 PM
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i have parts if you need them to get the car back together! no charge, just replace what you use!! This is what the Hotrodders Bulletin Board is all about!!e-mail me with what u need!!
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Old 03-31-2010, 07:40 AM
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4-bar parts

Dear Streetrodderbn,
Thank you for the offer of parts for my suspension but i ordered them already,I will have them this friday 4/2. Meanwhile I'm taking this opportunity to get under the car and clean and polish ,inspect etc.I'll post my car pictures also when i figure it out...I'm working graveyard @ LAX tonight
and tomorrow,I'll post the pics sometime after that
Thanks ,
SPRING66
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