Need Advice on Loose Suspension Bushing in Rear Control Arm | FerrariChat
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Need Advice on Loose Suspension Bushing in Rear Control Arm

Discussion in '308/328' started by ItalianProjects101, Apr 26, 2024.

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  1. ItalianProjects101

    ItalianProjects101 Karting

    Feb 5, 2023
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    #1 ItalianProjects101, Apr 26, 2024
    Hey fellow Ferrari enthusiasts,

    I need some guidance regarding a slight issue I've encountered with my Ferrari's rear control arm. As you can see in the video attached, one of the bushings that's supposed to be press-fit into the control arm seems to be going in loose.

    I've received suggestions from others to push the bushing in and use a punch to keep it in place. However, before proceeding, I wanted to reach out to this community for any additional insights or alternative solutions.

    While other bushings that required welding have been taken care of, these particular ones are only press-fit. I want to ensure the correct approach is taken to maintain the integrity and functionality of the control arm.

    Your expertise and advice would be greatly appreciated!
     
  2. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
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    Brian Crall
    #2 Rifledriver, Apr 26, 2024
    Video attached?
     
  3. ItalianProjects101

    ItalianProjects101 Karting

    Feb 5, 2023
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    #3 ItalianProjects101, Apr 26, 2024
     
  4. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
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    #4 Rifledriver, Apr 26, 2024
    Where did you get the bushings? Was the old one loose? Did you measure them to see if they are the same diameter?
     
  5. ItalianProjects101

    ItalianProjects101 Karting

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    #5 ItalianProjects101, Apr 26, 2024
    Bought from Superformance. They were a little tight when I removed them, but I am testing with one of the old bushings and as you can see it is also loose. Prior to isntalling the other new ones I even tested those with this whole and they also go in loose.
     
  6. Portofino

    Portofino Formula Junior

    Sep 17, 2011
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    Portofino
    #6 Portofino, Apr 26, 2024
    They don’t rely on the elastomeric component .That’s the rubber twisting ……because it’s outer rim is not tack welded to the arm and the inner rim bolt tight .Leaving the rubber in between to flex .

    As they are the whole bush rotates …..nothing particularly wrong with that depends which suspension camp you reside ?

    As they are they should never wear ( tear or rip ) but transmit a little more harshly the suspension in the sense not ride as well as OEM flambloc bushes .Better obviously on a smooth track .
     
  7. Rifledriver

    Rifledriver Three Time F1 World Champ

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    Brian Crall
    #7 Rifledriver, Apr 26, 2024
    Wrong bushing.
     
  8. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
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    Brian Crall
    #8 Rifledriver, Apr 26, 2024
    If they were tight when you removed them, why are the same old bushings loose now?

    The only reason I can think of is if you were not pushing them perfectly straight and stretched the hole. If the same happens on re installation you'll have a mess on your hands. They need to be installed with a significant interference fit.

    They will need to be welded or brazed in place prior to installing the sleeve bushings but they also need to be perfectly aligned with each other to prevent binding and rapid wear of the new bushings when all assembled. Why did those get replaced anyway? They are not a wear item. The sleeve bushings are and the thrust washers are but the steel bushing housings are not.
     
    maurice70 and Martin308GTB like this.
  9. redline76

    redline76 Formula Junior

    Feb 26, 2008
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    Warren V
    #9 redline76, Apr 26, 2024
  10. Martin308GTB

    Martin308GTB F1 Rookie

    Jan 22, 2003
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    #10 Martin308GTB, Apr 27, 2024
    If you stretched the hole and the old housings are now also loose, the only solution to rescue the A-arms is having new custom made housings manufactured, which will again be a press fit.
    And like Brian (rifledriver) asked; Why did you replace these housings? Under normal circumstances they never wear.

    Shims or welding are hack jobs.

    Best from Germany
    Martin
     

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