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Best gearbox for my gen 1 3sge

Discussion in 'Drivetrain' started by Hazzmac92, Dec 16, 2013.

  1. Hazzmac92

    Hazzmac92 Well-Known Member

    Hey guys my gearbox is on its way out
    my question is, what s series box has the best ratios, looking for the largest final drive available, i will also be throwing a kaaz or trd 1.5 way lsd in
    thanks in advance
  2. Stig

    Stig ST162 Guru Donated!

    By largest you mean the shortest gearing?

    Best would be a JDM box from a later ST20x car, I believe the Beams cars already have LSD.
    Most non JDM are 3.9 which is good for economy but lousy for acceleration, jdm's mostly are 4.1 which helps explain why the jdm's make much more power
  3. Hazzmac92

    Hazzmac92 Well-Known Member

    Yes that's what I mean
    I want a direct fit box would it be better to put a 4.1 crown wheel in a s53 ? Or is a beams box a direct fit into a st162
  4. Stig

    Stig ST162 Guru Donated!

    Yes direct fit, just swap your mounts over
    LSD boxes use different shaft inners, you'd have to mod some up and use the outboard starter as well which is far better/common

    You can't swap crownwheels without swapping the final gear shaft as well = TOTAL rebuild
    Check my thread for more info and pics of my ST182 box swap
    Last edited: Dec 16, 2013
  5. Hazzmac92

    Hazzmac92 Well-Known Member

    shall check it out
    found out i have a s53 3sfe gearbox sigh has a 3.7:1 final drive
    so my thought would be run the stock s54 which is apparently a 4.1:1
    rebuild it
    throw an kaaz lsd in

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