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2018+ Gt gearing

Discussion in '2015+ S550 Mustang Talk' started by jdcobra, Jun 12, 2020.

  1. jdcobra

    jdcobra Well-Known Member Established Member

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    I opted for the 3.15 gears as the cars they had the COVID deals on did not have the 3.55s. Was curious to see to went with the 3.55 and went forced induction. Do you regret your decision with 3.55 or are they a good in between? Thanks
     
  2. basspro302

    basspro302 Active Member Established Member

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    3:55 is too much in the 10 speed when boosted its even to much in the 6r80. 3:15 was the right choice
     
  3. mitchster

    mitchster Member Established Member

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    I have 3.31 gears in my 2013 GT with roush supercharger and I like it alot.
     
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  4. jdcobra

    jdcobra Well-Known Member Established Member

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    I wish they had thrown 3.31 gears in the autos instead of the 3.15s. That would have been a better middle ground in my opinion.
     
  5. biminiLX

    biminiLX never stock Established Member

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    Easy, just add more boost! :)
    -J
     
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  6. jdcobra

    jdcobra Well-Known Member Established Member

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    I wish! Just shelled out 15k for a procedure insurance wanted me to wait 8-10 months for before approving.
     
  7. basspro302

    basspro302 Active Member Established Member

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    10r80 stock is going to have trouble holding power in the higher gears that’s why 3:15 is a better choice. I would save that money from swapping to a 3:55 for a converter and clutches for the 10r.
     
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  8. jdcobra

    jdcobra Well-Known Member Established Member

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    Thanks for the info!
     
  9. gimmie11s

    gimmie11s Don’t be an idiot Established Member

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    3.55’s and boost is not desirable with the 10 speed.

    You will be in 7th gear as you go through the traps with 3.55’s. 7th gear is weak in the 10r so that is not desirable.

    3.15’s are what you want with boost because you’ll stay in 6th gear at the end of 1/4 mi.

    You made the right choice.


    Sent from my iPhone using svtperformance.com
     
    Last edited: Jun 13, 2020
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