455 and the Super T10

Discussion in 'U-shift em' started by lt1b4c, Oct 11, 2021.

  1. lt1b4c

    lt1b4c Well-Known Member

    Is it fair to say a super T10 from a 1980 z28 with a 3.42:1 gear set would not work well behind a 70' 455?

    Has anyone run this setup?

    Changing the rear end gear ratio to make this work would not be a problem. 1970 Skylark street car.

    Thanks.
     
  2. quickstage1

    quickstage1 Well-Known Member

    I have had a Super T10 from similar year Z28 behind the big block in my convertible for 10 years with no issue. Mine has the 2.88 first gear and 3.42 rear gears. I rebuilt it before I installed it. I don't race it at the track or use sticky tires on it but have driven it hard on occasion. It's probably not the best choice if you plan on running it hard often. My dad ran a rebuilt T10 behind a big block for a for a few years in his car before switching to a Muncie M23 with no problems.

    Ken
     
  3. lt1b4c

    lt1b4c Well-Known Member

    Thanks Ken, that was great to read. My drive ability will be similar to you and your dad.
     
  4. lt1b4c

    lt1b4c Well-Known Member

    Is it true the numerically higher (more teeth) the first gear ratio is on the super T10s equals a weaker trans?

    If my calculations are correct, this would be decent.

    New first x existing first (th350) / rear end gear ratio = the type of drivable gear ratio it has?

    3.42 x 2.52 / 2.73 = 3.70
     

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