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Technical Differential Gear Ratio - 1959 Chevrolet Nomad

Discussion in 'The Hokey Ass Message Board' started by Daddyohs, May 14, 2015.

  1. Hy
    I need your help.
    The owner before me, made an engine and transmission swap. Before there was an 6 cylinder engine inside with manual 3 gear. NOW its 350 small block inside and TH350 transmission.
    The rear end have a ratio with 3,93. I can´t drive higher speeds, the engine run high rpm.
    Whats your experience - What can I do?

    Thank you
    Andy
     
  2. 2OLD2FAST
    Joined: Feb 3, 2010
    Posts: 5,263

    2OLD2FAST
    Member
    from illinois

    Chev. rears interchange '55-'64 many had 3.08 gears , find a centersection & swap it ...
    dave
     
  3. 2OLD2FAST
    Joined: Feb 3, 2010
    Posts: 5,263

    2OLD2FAST
    Member
    from illinois

    I believe that would work , but why not find a whole center-section ...? far easier to install...dave
     

  4. 2OLD2FAST
    Joined: Feb 3, 2010
    Posts: 5,263

    2OLD2FAST
    Member
    from illinois

    If you're bound & determined to change the ring&pinion , call or contact Randy's Ring&Pinion.... good people , good help , good products
    dave
     
  5. oldolds
    Joined: Oct 18, 2010
    Posts: 3,409

    oldolds
    Member

    2OLD2FAST This guy is in Austria. Things are a bit complicated there.
    If you can find a center section there with the correct gears that would be the simple way. If not get the gearset you need and have it installed. You can't afford to have a whole center section shipped from the states. The gearset will cost more than enough to ship.
     
  6. Baumi
    Joined: Jan 28, 2003
    Posts: 3,046

    Baumi
    ALLIANCE MEMBER

    Andy, maybe Lexi has a a 62 powerglide rearend, they were 3.36 or even 3.08 if I remember correctly and the would reduce your rpms tremendously. I have a 56 Chevy rearend but thats a 3.55. In my 56 Bel Air is a 62 Impala 283 Powerglide differential with 3.36 gears. You can use anything from 55 to 64.
    I´m also looking for a lower gear ratio rearend for my 55 aswell, it has 4.11 gears...
     
  7. Thank you Baumi - I will contact Lexi soon.

    Who can tell me more about this numbers? This rear axle is now installed in my Nomad.
    I found at google - 3707306 is from a 56 chevy passenger car. But what mean this OD36?
    [​IMG]
     
  8. 302GMC
    Joined: Dec 15, 2005
    Posts: 7,875

    302GMC
    Member
    from Idaho

    April 3, 1956 ?
     
  9. That is a GM date code. It is actually "D36". As mentioned by 302GMC, that translates to April 3, 1956.
     
  10. found on ebay an whole center section 3.08 and 3.36
    I bought both - to test.
    Thanks for help
     
  11. Baumi
    Joined: Jan 28, 2003
    Posts: 3,046

    Baumi
    ALLIANCE MEMBER

    Andy, Ill take the one you dont need!
     
  12. Allright Baumi - but need time. The truck with all parts will arrive August. Test to know which one is good for me need a few more weeks. So I hope you are not in a hurry.
     
  13. Jalopy Joker
    Joined: Sep 3, 2006
    Posts: 31,262

    Jalopy Joker
    Member

    can always get close on what ratio is best by searching sites like= project33.com = then click on calculator
     

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