6R80 and 3.73s - Who's done it?

Discussion in 'Transmission & Drivetrain' started by Bluemustang, Feb 14, 2019.

  1. Bluemustang

    Bluemustang Well-Known Member

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    I am considering swapping a 3.73 Torsen into my 6R80-equipped car. Who's done it and what can you tell me about it?
    Right now I have the base 3.15 gears and of course the Torsen won't fit the housing. 3.55 Torsens aren't readily available although I could always buy the 3.73 housing and swap 3.55 gears into it. But doing that I feel like 1st gear would be useless anyway if I go 3.55s or 3.73s so it probably doesn't matter much. At that point I feel like 3.73s might be the better option because all the other gears 2-6 would be improved. What say you?
     
  2. Jay-rod427

    Jay-rod427 Well-Known Member

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    I'd be down to swap ya if you go 3.55.
     
  3. OP
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    Bluemustang

    Bluemustang Well-Known Member

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    Why, you want the 3.15s?
     
  4. Jay-rod427

    Jay-rod427 Well-Known Member

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    Yes. Boosted life. 1st-3rd are pretty useless. You auto or manual?
     
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    Bluemustang

    Bluemustang Well-Known Member

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    Ahh, I see. Yeah I'm auto. What I am really after is the Torsen diff, but it won't fit in the housing that comes with the 3.15 gears.
     
  6. Zinc03svt

    Zinc03svt Well-Known Member

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    I believe the torsion setups go in the larger iron case. You will need the complete differential. I love my 3.55 pp1 with the A10. As stated for boost the 3.15’s are generally more desirable especially turbo setups.
     
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