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NOOB question: Trailing Arms?

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Old Mar 26, 2009 | 06:39 PM
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Default NOOB question: Trailing Arms?

Please forgive my incredible ignorance, but I'm very wet behind the ears when it comes to all cars and have a few burning questions.

1. What exactly do trailing arms do?

2. How do you know when they're bad and need to be replaced?

3. If they need repair/replacement and I'm not interested in originality, am I better off buying new ones? Saw some on Wilcox for less than $200/each.

4. Is this something a noob with a 68 convertible, 2 jack stands, a floor jack, and a good set of tools can handle, or should I take it to the shop?

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Old Mar 26, 2009 | 06:57 PM
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you will need
a sawzall...with some good metal blades

pentetrating oil

some duct tape.... after you bust up your knuckles a few times...

are you just getting new t-arms with bushing or also wheel bearings too
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Old Mar 26, 2009 | 07:03 PM
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I'll jump in on some of this..............

starting with #4:

Depending on your level of mechanical expertise, yes, you can take these off with the equipment you listed. I refurbished/ rebuilt everything last year from the driveshaft back. My 72 had about 75000 actual miles on it so I just had the differential inspected by a pro. They changed the seals while they were in there. I had to buy one trailing arm, but the other one was fine. Again, I had a machine shop disassemble and rebuild the arms. But I did all the rest myself: new u-joints, brakes, emergency brakes (installed by the shop), calipers, spring, struts, shocks, etc. I removed the arms and reinstalled them by myself. They came off easily and went back on without too much trouble. Then I had alignment done.

Trailing arms are a moving part of the framework. They connect the halfshafts coming from the differential to the wheels. Supported by the arms are the brakes, emergency brakes, shocks, rear spring and wheels.

I spent around $1000 and took almost 6 weeks doing this project.






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Old Mar 26, 2009 | 07:10 PM
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This is the trailing arm.



This is what they look like laying on the floor.



Please remember that it takes a lot of work to get them from their original position, to the floor. I used a can of PB blaster and an air hammer. Other guys have used a saws all to cut the bolts holding them in. Either way, it's not an easy task. Then it takes some special tools to pull them apart and rebuild them. I don't have the tools so I took them somewhere and had them done.

Good luck.
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Old Mar 26, 2009 | 09:39 PM
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once you clean up that rear though.... the rest is cake
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Old Mar 27, 2009 | 06:47 PM
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Hey you guys, I just bought a beautiful set, with rotors and all, from Jacobs Corvette's in Coraopolis, PA. Mr. Harvey does a out of site job. I know that there a lot of good people rebuilding them. Look at his work, been in business for 30 years. Doctorgene
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Old Mar 27, 2009 | 11:39 PM
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I pulled mine and sent them off to Van Steel for a complete rebuild. Excellent job and, I never have to worry about them again!
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Old Mar 28, 2009 | 01:34 AM
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so does anybody know when they NEED to be replaced?
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Old Mar 28, 2009 | 12:10 PM
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Originally Posted by onaqwst
you will need
a sawzall...with some good metal blades

pentetrating oil

some duct tape.... after you bust up your knuckles a few times...

are you just getting new t-arms with bushing or also wheel bearings too
I haven't decided if mine need immediate attention, to be honest. We replaced the rear leaf spring and adjusted the camber of my rear wheels, and while doing so noticed my trailing arms looked horrific. Everything else looks decent and I'm wondering if I need to jump into the trailing arms just because they look crusty in comparison to the rest of the vehicle now. I do need to have the wheel bearings redone soon. There's a bit of play in my wheels, but no clunking or weird noises. I was hoping to get a complete set with the bushings as well, but don't want to start the project if it's going to be over my head.



Thanks for all the advice and pics, guys!
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Old Mar 28, 2009 | 12:10 PM
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Originally Posted by Ward72
I pulled mine and sent them off to Van Steel for a complete rebuild. Excellent job and, I never have to worry about them again!
What'd that end up costing, if you don't mind me asking?
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Old Mar 28, 2009 | 12:13 PM
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Originally Posted by couperdecar
so does anybody know when they NEED to be replaced?
Ditto... are there any signs to look for other than cosmetic? I had my frame powder coated, and next to my frame they look awful, but I haven't noticed any performance issues.
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Old Mar 28, 2009 | 12:38 PM
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Originally Posted by fe1ixdakatt
Ditto... are there any signs to look for other than cosmetic? I had my frame powder coated, and next to my frame they look awful, but I haven't noticed any performance issues.
If it hasn't already been done, then it needs to be done.
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Old Mar 28, 2009 | 01:20 PM
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when i rebuilt mine, i replaced one of the arms. the welds were split wide open and had rotted away too much to reweld.
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