8.8 Rear End Spider Gear Shim Spining? Any Idea Why

Discussion in 'Fox 5.0 Mustang Tech' started by tacomatrx450f, Dec 7, 2013.


  1. tacomatrx450f

    tacomatrx450f Member

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    Hey Guys, so i have a question.. i picked up a 8.8 rear end yesterday that has 3.55 gears, and i noticed the driver side rotor was crazy worn, so i removed the pumpkin cover and one of the spider gear shims was not seating correctly, had spin and bent the tabs also it had caused the spider gear to lock. any idea how this could happen? can i just replaced the damaged shim and be done with it, or is it more critical then this?
    Last edited: Dec 7, 2013
  2. 2000xp8

    2000xp8 Mustang Master

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    While i don't know what caused your issue, if you are going to dig into the rear end and mess with shims, i'd consider rebuilding the entire thing.
    Done right a rear will last a long time, if you just fix the shim you will probably be doing it again soon after.


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  3. madspeed

    madspeed Colonel Mustard Mod Dude Founding Member

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    5000 rpm launches with drag slicks on an improperly installed set of gears
  4. flstang65

    flstang65 Well-Known Member

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    Your rotor was "crazy" worn like how?
  5. 84Ttop

    84Ttop They make new pistons every day, so why worry? SN Certified Technician

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    Sounds like it needs to come all the way apart and get setup correctly this time. My 3 cents...

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