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Differential mounting bushings

Discussion in 'Driveline' started by efnfast, Jun 9, 2019.

  1. efnfast

    efnfast Member Established Member

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    Are there any front differential mounting bushing kits that are similar material to OEM bushings so you can just change the front bushings and not the rear?

    I notice several of the kits say when going to poly or solid you need to change the rear also or different stiffness of material can cause mounting points to fatigue and crack.

    My fronts are shot and I'm lazy and don't feel like dropping the differential to do the rear if I can avoid it.
     
  2. shurur

    shurur Well-Known Member Established Member

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    I think energy suspension sells some that you could get away with using.
    That is probably the closest you can get to rubber bushings.
    # 41126 carrier bushings
     
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  3. Bdubbs

    Bdubbs u even lift bro? Established Member

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    Great question op, I'm thinking of doing the same thing to my 90 notch that has a irs.

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  4. efnfast

    efnfast Member Established Member

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    Perhaps a better question might be, if I'm not tracking the car can I get away with just changing the front bushings to polyurethane, or do I also need to do the rear as well to prevent mounting points from cracking? i.e., is changing the rear only necissary if driving the car hard?
     
  5. P49Y-CY

    P49Y-CY selfie deaths ftw Established Member

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    Do the fronts and the back while it's out.
     
  6. Bdubbs

    Bdubbs u even lift bro? Established Member

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    I think what op is referring to, is the front can be replaced without removing the the diff.

    In saying that, you suggest removing it and replacing all?

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  7. P49Y-CY

    P49Y-CY selfie deaths ftw Established Member

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    I'd say so, yeah. So many times I would be on my back trying to juggle that thing, trying to perhaps save a step or two - and looking back it was never worth it.

    Solidly locating that pumpkin is the first (and best) thing you should do for the irs, so do it up right and drop it and replace both fronts and back. Even the stock eggshell cover can live for a long time on a pumpkin that doesn't move.
     
  8. Bdubbs

    Bdubbs u even lift bro? Established Member

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    I understand that. But my 90 notch has maybe 300 hp, it has a diff brace. I just don't see upgrading everything at this point in time.

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  9. slo984now

    slo984now AKA 01yellerCobra Established Member

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    FWIW I only did the front diff mounts on my 01. I went with the poly because I got a deal. I only had those and the Billetflow diff brace. Never had a diff issue even with drag radials and a blown stroker.
     
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  10. Bdubbs

    Bdubbs u even lift bro? Established Member

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    Awesome thanks!

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