1975 Camaro Rear Axle

Discussion in 'Transmission & Driveline Topics' started by SPG, Oct 1, 2018.

  1. SPG

    SPG Bumblebee Builder

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    Hello, I have a lot of questions but I'll just take it one step at a time. I got a 1975 camaro and will be putting a lt4 engine in it from a salvaged corvette....Since this motor has some serious power in it, should I replace the rear axle with something that's not older than I am? and if so what would you recommend I buy? I noticed a lot of people recommend moser but I honestly have no idea what I'm looking at...or if that's even a good deal.
     
  2. Gary S

    Gary S Administrator Lifetime Gold Member

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    The rear axle in a 1975 Camaro is stronger than the axles used in the newer Camaros with the LT engines, so old alone isn't a problem. When it comes to GM rear axles, older means stronger.
     
  3. SPG

    SPG Bumblebee Builder

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    Oh...fantastic! Always glad to hear I can save a few grand haha.
     
  4. BonzoHansen

    BonzoHansen Administrator Lifetime Gold Member

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    When the time comes I would simply rebuild the 8.5 you have now with quality parts, maybe step up to 30 spline axles.

    Lt4 like a late 90s vette motor? nice mill, but your current rear can take that no problem.
     
  5. SPG

    SPG Bumblebee Builder

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    no, it's a lt4 from a 2015 z06
    I already have the engine in hand and works fine from what I've gathered (rear end collision, front is untouched)
     
  6. BonzoHansen

    BonzoHansen Administrator Lifetime Gold Member

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    Nice!
     
  7. SPG

    SPG Bumblebee Builder

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    With that powerful of an engine do you think I would still be fine? or no
    I'll upgrade to a 30 spline axle
     
  8. Peck

    Peck Veteran Member

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    Honestly you will probably still be fine, 30 spline axles never hurt anyone though.
    Is the differential open or positraction?
    Often times rear ends break not due to to much power but poor suspensions setup. Wheel hop and axle wrap will break things before power in my experience.
     
  9. SPG

    SPG Bumblebee Builder

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    Limited slip (so I guess open)
    I want to put this level 2 suspension kit in it https://www.qa1.net/70-81-gm-fbody-handling-suspension-kits
    I don't plan on drifting or anything in this car....maybe autocross far down the future but I'm not a good enough driver for that.....and I honestly don't think I want to build the car for that.....yes I know the engine is way overkill, but I got it very cheap with the trans and computer, so who cares.
     
  10. big gear head

    big gear head Veteran Member

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    The 8.5 rear end in your Camaro is as strong as the rear end that was in the Vette that your engine came from. Most of the Camaors came with a standard differential, so upgrading to some type of limited slip differential is recommended. Also, the 30 spline axle upgrade should be done at the same time.
     

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