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2009 GT500 rear gear options?

Discussion in 'SVT Shelby GT500' started by acobra03, Apr 23, 2011.

  1. acobra03

    acobra03 New Member Established Member

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    Did Ford offer a 3.55 rear gear option for 2009 GT500's? The reason I'm asking is when I was installed my UCA/LCA's I noticed the tag on my diff cover said 3.55. I was under the impression the 07 to 09 came with 3.31's from the factory. I bought my car new off the showroom floor so I know it was a unmolested car.
     
  2. 2blown

    2blown New Member Established Member

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    my 2010 has 3.55 in it...not sure about the '09s though
     
  3. acobra03

    acobra03 New Member Established Member

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    The 2007 to 2009 came standard with 3.31's. The 2010 came standard with 3.55's. That's why I'm questioning why my diff is tagged 3.55. Guess I don't need to upgrade the rear gear!
     
  4. ShakeNBake

    ShakeNBake New Member Established Member

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    lucky lucky guy. :rockon:
     
  5. pony23

    pony23 Active Member Established Member

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    Is it a late 2009? Maybe they were already getting tooled up for the 2010's when it was made.
     
  6. acobra03

    acobra03 New Member Established Member

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    Yes, it was a late 2009. I bought it just before the 2010's hit the streets. I'm guessing it had a 2010 rearend set up. I guess I am lucky to get it. I know the rear gear is a popular mod with the 07 to 09's.
     
  7. jimh

    jimh Member Established Member

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    In 6th gear with 3.31 at 2000 rpms you should be doing 77mph, with 3.55 you should be at 72mph. So if you're below 75mph at 2000 you've got 3.55s. Unless you got a 2010 trans too, the 2010 trans has a taller 6th gear (.50 instead of .63). With a 2010 trans you'd be doing 90mph at 2000 with 3.55.
     
  8. acobra03

    acobra03 New Member Established Member

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    I have to take it out for a cruise today to see what rpms I'm turning at 70mph.
     
  9. acobra03

    acobra03 New Member Established Member

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    Ok, at 2000 rpm in 6th gear I'm running just under 75mph. How about that, and 09 with factory 3.55's!
     
  10. rodfarva

    rodfarva Active Member Established Member

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    This is why I say "Never say never" when it comes to Ford.
     
  11. Tob

    Tob Salut! Staff Member Super Moderator

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    Can you provide a shot of the tag on the cover? I'd like to break it down...
     
  12. Seahorse

    Seahorse Well-Known Member Established Member

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    What does your door jamb sticker indicate for axle code?

    CG=3.31
    CD=3.55

    On my 3.31 equipped '09 it shows "CG"

    513dfd29.jpg
     
    Last edited: Apr 24, 2011
  13. acobra03

    acobra03 New Member Established Member

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    It shows CG but the sticker on the rear diff cover says 3.55.
     
  14. acobra03

    acobra03 New Member Established Member

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    I took a picture of the sticker with my POS phone, it's not worth posting even if I could. Anyway, it's got a barcode but on the bottom left side under the barcode it says 3.55.
     
  15. que4dog

    que4dog Active Member Established Member

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    What size rear tires are you running?
     
  16. Islandcat

    Islandcat Active Member Established Member

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    When I had stock gears I did around 75 at 2000 rpm.
     
  17. 09Troublemaker

    09Troublemaker " That don't sound stock" Established Member

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    not much of a difference either way
     
  18. acobra03

    acobra03 New Member Established Member

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    Stock
     
  19. acobra03

    acobra03 New Member Established Member

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    I love the look of your car with those rims. Very nice.
     
  20. 09Troublemaker

    09Troublemaker " That don't sound stock" Established Member

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    thanks:beer:
     

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