Tranny set-up

Discussion in '40- & 55-Series Tech' started by ryeguy, Apr 1, 2003.

  1. ryeguy

    ryeguy

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    A friend of mine just gave me(well for a case of beer) a 283 Chev. motor and I plan to re-build it and put it in my cruiser. I was wondering if anyone can tell me if my stock tranny will hold up to it. I have a '74 Fj40 with the 3-speed.

    Call me crazy but I kinda like the 3-speed tranny :dunno:.


    rye
     
  2. megolfer

    megolfer

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    I emailed you, check your email
     
  3. Pin_Head

    Pin_Head

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    If you like the 3sp, you will love the sm420.
     
  4. ryeguy

    ryeguy

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    Pin_head

    what about the sm420?
     
  5. theo

    theo

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    Granny gear (7.05:1)! Plus, you can pick them up cheap, they last a long time, and parts are pretty easy to find. And they're tough enough for the punishment. The sm465 is more common but has a slightly higher 1st gear ratio. Either one will work fine.
     
  6. Pin_Head

    Pin_Head

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    The sm420 (and sm465) are just like having a floor shift 3sp that has an extra low granny gear. Around town, you just use 2-4 and when you need it, you drop it into the extra low 7.05:1 first. They bolt right up to the chevy small block and all you need is an T'case adpator plate and a few odds and ends. See the technical links section for details.
     
  7. ryeguy

    ryeguy

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    Can these trannys be sourced from something? If so what kind of donor vehicle should I look for?

    That super low first gear sounds GREAT!
     
  8. megolfer

    megolfer

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    1947-1967 in 1/2 to 2.5 ton chevy trucks. Look at the tech links on this site and it will tell you more
     
  9. ryeguy

    ryeguy

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    Thank you
     
  10. Mavric1298

    Mavric1298

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    I'll tell ya from first hand experience, they kick ass. They are pretty loud trannys, but hell the 7.05 kicks ass! and the final gear is 1 to 1 same as stock 4 speed cruiser!
     
  11. megolfer

    megolfer

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    Im going with the sm465. Mine is a daily driver so I want to have the full syncros and its not that much of a difference in gears. It is a little more to put in but I think its worth it. They are also one of the strongest 4 speeds around.
     
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